Question

Determine whether the given lengths can be sides of a right triangle. Which of the following are true statements? The lengths 14, 24 and 26 cannot be sides of a right triangle. The lengths 30, 72, and 78 can be sides of a right triangle. The lengths 14, 24 and 26 can be sides of a right triangle. The lengths 30, 72, and 78 cannot be sides of a right triangle. The lengths 14, 24 and 26 can be sides of a right triangle. The lengths 30, 72, and 78 can be sides of a right triangle. The lengths 14, 24 and 26 cannot be sides of a right triangle. The lengths 30, 72, and 78 cannot be sides of a right triangle.

Answer 1

true, true, false,false, false,true,true,false

See explanations below

Explanation:

If three sides can make a RIGHT triangle, then the sum of squares of the two shorter sides EQUALS the square of the third side, using the Pythatorean theorem.

Determine whether the given lengths can be sides of a right triangle. Which of the following are true statements?

The lengths 14, 24 and 26 cannot be sides of a right triangle.

TRUE, A^2+B^2-C^2=4sqrt(6)

The lengths 30, 72, and 78 can be sides of a right triangle.

TRUE, A^2+B^2-C^2= 0

The lengths 14, 24 and 26 can be sides of a right triangle.

FALSE, A^2+B^2-C^2=4sqrt(6)

The lengths 30, 72, and 78 cannot be sides of a right triangle.

FALSE, A^2+B^2-C^2= 0

The lengths 14, 24 and 26 can be sides of a right triangle.

FALSE, A^2+B^2-C^2=4sqrt(6)

The lengths 30, 72, and 78 can be sides of a right triangle.

TRUE, A^2+B^2-C^2= 0

The lengths 14, 24 and 26 cannot be sides of a right triangle.

TRUE, A^2+B^2-C^2=4sqrt(6)

The lengths 30, 72, and 78 cannot be sides of a right triangle.

FALSE, A^2+B^2-C^2= 0

Answer 2

The lengths 14, 24, and 26 cannot be the sides of a right triangle. The lengths 30, 72, 78 can be the sides of a right triangle.

Explanation:

To prove that the lengths 14, 24, and 26 cannot be the sides of a right triangle:

a=14, b=24, c=26

Pythagoreon theorem: a^2+b^2=c^2

substitute values in: 14^2+24^2=26^2

simplify: 196+576=676

simplify again: 772=676, which is not true

This proves that the lengths 14, 24, and 26 cannot be the sides of a right triangle.

To prove that the lengths 30, 72, and 78 can be the sides of a right triangle:

a=30, b=72, c=78

Pythagoreon theorem: a^2+b^2=c^2

substitute values in: 30^2+72^2=78^2

simplify: 900+5184=6084

simplify again: 6084=6084, which is true

This proves that the lengths 30, 72, and 78 can be the sides of a right triangle.