Flag 9 grade maths> In a triangle ABC, AB=AC and angle A = 50...
question mark

In a triangle ABC, AB=AC and angle A = 50, find angle B and angle C

Makarand Hinge Sky High Virus , 7 Years ago
Grade 9
anser 3 Answers
Phanindra

Last Activity: 7 Years ago

If two sides are equal then their opposite angles are also equal...this is isoceles triangle property...
So angle B and C are equal....
So...by angle sum property...
A + B + C = 180...
B + B = 180 - 50... 
             = 130 
Sooo.....B = C = 65
Sugnyan S Abblgeri

Last Activity: 7 Years ago

Triangle ABC is an isosceles triangle because the two sides are equal that is AB=AC
Angle A =50
So in isosceles triangle the angles opposite to equal sides are equal
So Angle B=Angle C
Then Angle C can be written as Angle B
now by angle sum property
A+B+C=180
A+B+B=180
A+2B=180
50+2B=180
2B=180-50
2B=130
B=130/2
B=65
So Angle C =65
Therefore Angle B=65 and Angle C=65
 
 
Bharat Luthra

Last Activity: 7 Years ago

In an isosceles triangle, the angles opposite to equal sides are equal.
so angle B=angle C
By angle sum property of triangle,
angle A+angle B+angle C=180 degree
or 50 degree+angle B+ angle B(an angle B=angle C)=180 degree
or 2*angle B=180 – 50 degree
or 2*angle B=130 degree
or angle B=130/2 degree
or angle B=65 degree
thus angle B=65 degree and angle C= 65 degree
star
LIVE ONLINE CLASSES

Prepraring for the competition made easy just by live online class.

tv

Full Live Access

material

Study Material

removal

Live Doubts Solving

assignment

Daily Class Assignments