Question

Look at triangles A through F shown in the rectangles below.Which triangles are acute triangles?

Answer 1

The acute triangles are those whose all 3 angles have a measure less than 90 degrees.

We need to follow the next image:

Let us check each triangle.

Triangle A:

It has a right angle, hence, it can not be an acute triangle.

Triangle B:

All three sides are less than 90 degrees. Hence, it is an acute triangle

Triangle C:

It has an angle with a measure of more than 90 degrees. Hence, it can not be an acute triangle.

Triangle D

All three sides are less than 90 degrees. Hence, it is an acute triangle.

Triangle E

It has a side with a measure of more than 90 degrees. Hence, it can not be an acute triangle.

Triangle F

It has a right angle, hence, it can not be an acute triangle.

Hence, the correct answer is H. B and D