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​

Answer 1

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°

Answer 2

Answer:

Hear is your answer ok.....