Question

In the figure angle A= 60 degree ,AB=AC=7.2cm.a)what is the measure of angle B,b)find the length of BC

Answer 1

your answer is here.
:-- by Rituraj (DAV gidi. )

Answer 2

Answer:

a) The measure of angle B is 60°,

b) The length of BC is 7.2 cm

Step-by-step explanation:

Here,

In triangle ABC,

m∠A = 60°,

AB = AC = 7.2 cm

If AB = AC

⇒ m∠B = m∠C

Let m∠B = x°,

∵ By the property of triangle,

m∠A + m∠B + m∠C = 180°

60° + x° + x° = 180°

60° + 2x° = 180°

2x = 120

x = 60

⇒ m∠ C = m∠B = 60°,

b) If all angles of a triangle are same then triangle has equal sides,

That is,

AB = AC = BC = 7.2 cm