Question

what angle is this? ( in the picture )

A. 90°
B. 60°
C. 45°
D. 30°​

Answer 1

Answer:

I think it is option c . 45

degree

hope it is helpful plese mark brainliest

Answer 2

Answer:

• 45° is the value of the angle.

Step-by-step explanation:

In the figure, ΔABC, (say)

We have,

• ∠B = 90°

[∵ Right angled triangle]

Let the other angles [∠A and ∠C be x and x]

So,

According to angle sum property:

• ∠A + ∠B + ∠C = 180°

⇒ x + 90° + x = 180°

⇒ 2x = 90°

⇒ x = 90°/2

⇒ x = 45°

∴ The values of ∠A and ∠C are 45° and 45°.

Verification:

∠A + ∠B + ∠C = 180° [Angle sum property]

⇒ 45° + 90° + 45° = 180°

⇒ 90° + 90° = 180°

⇒ 180° = 180°

∴ L.H.S = R.H.S