## (a) 50° In AABC, BC = AB and 2B=80°. Then, 2A=! (b) 400 (c) 100 (d) 80- 6. In A ABC, 2C = 2A, BC = 4 cm and AC = 5

Question

(a) 50°

In AABC, BC = AB and 2B=80°. Then, 2A=!

(b) 400

(c) 100

(d) 80-

6. In A ABC, 2C = 2A, BC = 4 cm and AC = 5 cm. Then, AB = ?

[b] 5 cm

(c) 8 cm (d) 2.5 cm

Tien sides of a triangle are al length lun and 2,5 cm. The length of the

(a) tom

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2021-08-16T13:56:12+00:00
2021-08-16T13:56:12+00:00 2 Answers
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## Answers ( )

Answer:Hear is your answer ok…..

Answer:

In triangle ABC, BC=AB and angle B= 80, then angle A = 50

Solution:

Given that in triangle ABC, BC = AB which means ABC is an isosceles triangle.

We know the sum of angles in a triangle is 180°. Since it is an isosceles triangle the measure of two angles will be same. Let ∠A = x and ∠c = x

We know,

Sum of all angles = 180°

x+x+80° = 180°

2x= 180°-80°

2x=100°

x= = 50

Thus the measure of ∠A = 50°