Question

9.1 one angle of a triangle is equal to the sum of the other how that the
of the triangle
​

Answer 1

Answer:

Step-by-step explanation:

Answer:

The one angle of triangle is equal to the sum of the other two.

Sum of the angle of a triangle = 180

/ A + / B + / C = 180°

/ C + ( / A + / B ) = 180°

/ C + / C = 180°

2 / C = 180°

/ C = 180 /2

/ C = 90°.

So, the Right - angled is proved .

Answer 2

Step-by-step explanation:

right angle

A

|\

| \

| \

| \

| \

| \

|______\

B C

here <B= 90°

<A = <C is 45°

<B= <A+<C