Question

Plz give me the answer of 2nd pls

Answer 1

Step-by-step explanation:

sum of the angles of a traingle= 180°

a) 20°+70°+90°= 180°

b) 50°+60°+90°= 200°

c)38°+72°+80°=190°

so first option is correct

Answer 2

Answer:

$\bold\red{(a)20°, 70°, 90°}$

Step-by-step Explanation:

We k ow that,

The sum of all the three angles of a triangle must be equal to 180°.

Now,

(a) 20°, 70°, 90°

Sum = (20+70+90) = (90+90)= 180°

Therefore,

It is triplet of a triangle.

(b) 50°, 60°, 90°

Sum = (50+60+90)=(110+90)= 200

It exceeds the required sum.

Therefore,

It is not the triplet of triangle.

(c) 38° ,72° 80°

Sum = (38+72+80)= (110+80) = 190°

Therefore,

It is not the triplet of triangle.

Hence,

the correct option is (a)