Question

pls help will mark brainliest
Arpitha lined up the interior angles of the triangle along the line below.

Answer 1

Answer:77

Step-by-step explanation:

Option 77 is right ...

99-22=77

Answer 2

Given:

ABC is a triangle.

To Find:

What is value of angle ∠A?

Solution:

When Arpitha lined up the interior angle of triangle, it is clear that :

$\mathbf{ \angle B = 22^{\circ}}$    (From figure of straight line)

$\mathbf{ \angle C = 99^{\circ}}$    (Given)

From triangle angle property in ΔABC :

∠A +∠B +∠C = 180°

On putting respective value in above equation:

∠A + 22° + 99° = 180°

⇒∠A + 121° = 180°

⇒∠A  = 180° - 121°

∴ ∠A  = 59°

So angle of ∠A  is 59°. Means option second is correct.