[Music] good day everyone in this video lesson we will discuss about parts of a circle a circle is a set of all points in a plane which are a given distance r from a given point on the plane the fixed point a is called the center of the circle so it don't point in at is the center of the circle and r is the radius of the circle a circle is named after its center so named and circle okay so name the following in the given figure at the left so my figure tai dito so in name nathan name the center name the circle and the radii so the radii is the plural for regis so what is the name of the center that is point a okay so the name of the center is point a and letter b what is the name of the circle so name that circle nothing is circle a or predicate symbol okay so again you name that circle nothing is circle a so do not nothing center nothing and then the two rages are the right the i so many times the long ranges and that is so the line segment ac and the line segment a b okay so radii another we have a ranges of a circle maybe any of the following okay remember first a segment those end points are at the center and a point on the circle so outrageous though not in class so that is a young endpoint okay length of the segment referred in number one so in other words the distance from the center to any point of the circle so that is the reduce the distance from the circle from the center of the circle to any point on the circle so union range is nothing a chord of a circle is a line segment that has its end points on the circle so again a chord of a circle is a line segment that has its end points on the circles chord and then the diameter of a circle is a chord that passes through the center of the circle so passes through the center of the circle so uh chord shop nakapak and then its length is twice as long as averages or so diameter so twice measure ac okay so name the following in the given circle a first name the chord name the diameter name the radii that make up the diameter and if the diameter is 12 centimeter how long it's radius so name the chord so a new chord not in detail so that is d e or the line segment d e or a d and then the diameter so in diameter nothing you do young chord the dominant center in a circle that is the line segment c b or b c okay and then uh the two lady i are the two regios that make up the diameter so that is ac and a b all right and panda pagan diameter now elantra is twice the length of the reduce so on and diameter nothing is 12 centimeters so twice no length radius in diameter so therefore kalahati so kalahati no diameter is the length of the ray juice and that is six centimeters so length that is 12 centimeter another mate in a tower time tangent so that is a line segment or array that intersects a circle at exactly one point is called a tangent line like intersection at exactly one point no no so a segment or array that intersect a circle at exactly two points so kanina exactly one point and tower not in tangent um maritime line or a segment or a rain and the intersect at exactly two points intersect exactly one point tangent and tawag kappa like exactly two points so it it's i either a line yarn or a segment or array but then intersects at exactly two points of the circle the entire netting secant okay so every chord being a line segment determines a secant and every secant being a line contains a chord tanda nothing exactly two points of the circle so name the following the given circle name the tangent the point of tangency the chord and the secant okay for the name of the tangent that is line l okay so nothing is line l and then the point of tangency that is point f or padding instead of point symbol that is point f and then name the chord sounding chord not indito so ito bc okay the line segment bc that is the chord and the secant is line bc okay it's either line bc or line m okay example b and c are points on the circle a if a b is equal to two x minus three and ac is equal to x plus one find the length of this radius and diameter so alumna then a b we can solve this that a b is equal to ac so i'm going to subtract value in the abilities are given at n and that is two x minus three equals your volume aces are given at and that's x plus one so the path length is x left side maxima not n and c negative three numbers are right side so 2x minus x that is x one plus three that is four so only nothing length of so we can say that a b is equal to ac and ace is equal to x plus one so substitute nothing volume x that is four four plus one five units so a big sub in class a to c that is five units in diameter twice the length of the reduce another we have point a is the center of two concentric circle so pakistan have been not in concentric circle so a circle with common center no circle which have the same center points or my comments as center sila okay like for example so if c is the uh midpoint of a b so eating a b not n midpoint of a b and then in sukhatnan e a is 10 centimeter so therefore mula di tokai a hang gang kai b so rages dingen on big circular equals so therefore that is 10 centimeter then so a b is equal to 10 centimeter next find bd b is 10 centimeter so that is the diameter no no this is a b this is 10 centimeter so since c is the midpoint now c is the midpoint of a b so a big sub b n from a to c that is five centimeter and then it don't so bd is equal to bc and that is also five centimeter okay another is the length of ed okay the length of edison so from point e to a that is 10 centimeter and point a to b is 10 centimeter illinion 20 plus five so therefore young lengthening ed is centimeters so alumni eb eb is twice no no volume 2 times 10 that is 20 plus 5 25 centimeter so due to pollen class and that is five centimeter so therefore the length of 80 is 15 centimeter thank you for watching this video i hope you learned something don't forget to like subscribe and hit the bell button put updated ko for more video tutorial this is your guide in learning your mod lesson your walmart channel