# Which are right triangles and which are not?There are 4 triangles.(0.9, 1.2,and 1.5)(7, 10, and 15)(3.1, 5.7,and 7.1)(1, 2.4, and 2.6) .

##### 1 Answer

Only

#### Explanation:

Let these triangles be

In a right angled triangle, we should have

sum of the squares of smaller two sides should be equal to the square on the largest side.

In **right angled triangle** .

In **acute** angled triangle.

In **acute** angled triangle.

In **obtuse** angled triangle.