Question

If two angles of a triangle are 40° and 90°. What is the measure of the third angle ? is a right angled triangle ?
​

Answer 1

Answer:

the third angle is 50°

Step-by-step explanation:

let the other angle be x

by angle sum property-:

40°+90°+ x= 180°

130°+x= 180°

therefore x= 180-130= 50°

so the other angle is 50°

yes, this triangle is a right angled triangle because one of its angle is 90°.