Question

(d)
(a) 60°
5. One of the base angles of an isosceles triangle is 70°. The vertical angle is
(b) 80°
(C) 40°
(d) 35°
in molled​

Answer 1

Answer:

40°

Step-by-step explanation:

Vertical angle = 180° - (2 × 70° )

= 180° - 140° = 40°

An isosceles triangle has two equal sides and thus two equal angles which are known as the base angles. The other angle is called the vertical angle. The sum of angles in a triangle is 180°.

Answer 2

Answer:

40°

Step-by-step explanation:

in isosceles triangle,

• angles opposite to equal side are equal

assuming 70° is one of the equal angle of them

let vertical angle be x

sum of all angles of triangle is 180°

therefore

70+70+x=180

140+x. =180

x= 180-140

x=40°

therefore option c

I hope it's helpful to you