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# Lesson Worksheet: The Converse of the Pythagorean Theorem Mathematics • 8th Grade

In this worksheet, we will practice using the converse of the Pythagorean theorem to determine whether a triangle is a right triangle.

**Q5: **

The Pythagorean theorem states that, in a right triangle, the area of a square on the hypotenuse is equal to the sum of the areas of the squares on the legs. Does this mean that a triangle where is necessarily a right triangle?

Let us assume that is of side lengths , , and , with . Let be a right triangle of side lengths , , and .

Using the Pythagorean theorem, what can you say about the relationship between , , and ?

- A
- B
- C

We know that for , .

What do you conclude about ?

- A
- B
- C

Is it possible to construct different triangles with the same length sides?

- ANo
- BYes

What do you conclude about ?

- AIt is similar to , so it has a right angle at .
- BIt is congruent to , so it has a right angle at .
- CIt is congruent to , so it has a right angle at .
- DIt is congruent to , so it has a right angle at .
- EIt is similar to , so it has a right angle at .

**Q6: **

In triangle , point lies on , , , , and . Find the length of to the nearest tenth, and then determine whether is a right triangle or not.

- A, a right triangle
- B, not a right triangle
- C, a right triangle
- D, not a right triangle

**Q7: **

In triangle , let on be the foot of the altitude from . If , , and , is right angled at ?

- ANo
- BYes

**Q9: **

What does equal to?

- A
- B
- C
- D

**Q10: **

In the figure shown, suppose that and . Determine and rounded to the nearest hundredth, if necessary.

- A,
- B,
- C,
- D,