When you add up all of the angles in a triangle, what is the total?

In the image, triangle is the right triangle or not?



In the image, triangle is the right triangle or not?

In the image, triangle is the right triangle or not?



In a triangle, $α=30°,β=60°$

Is the triangle is the right triangle or not?

 In a triangle, $α=55°,β=90°.$

Is the triangle is the right triangle or not?

In a triangle, $α=70°,β=20°.$ Is the triangle is the right triangle or not?

    What is the value of right angle?

In a triangle, $α=45°,β=45°.$ Is the triangle is the right triangle or not?

In the image, triangle is the right triangle or not?