Question

Classify the triangle based on the side lengths 4.2, 6.4 and 7.6.

Answer 1

Answer:

The triangle is acute.

Step-by-step explanation:

Basically, you need to use Pythagoras Theorem.

This is what you need to know then

In ABC with longest side c:

c²<a²+b² then the triangle is acute.

c²=a²+b² then the triangle is right.

c²>a²+b²  then the triangle is obtuse.

So let´s go Pythagoras Theorem for your triangle.

4.2²=17.64

6.4²=40.96

7.6²=57.76

57.76<17.64+40.96

So the triangle is acute