Right Triangles

Which equation would be used to solve for x?

• 34²+19²=x²

• sin(34)= 19/x

• cos(34)= 19/x

• cos^-1(19/34)

Which equation would be used to solve for x?

• x²+78²=11²

• sin(78)= x/11

• sin(11)= x/78

• sin^-1(11/78)

Find a - the length of a leg of the triangle.

• 5

• √2

• 5√2

• 2

What would you use to solve for x?

• Pythagorean Theorem

• Trig

• Inverse Trig

What would you use to solve for x?

• Pythagorean Theorem

• Trig

• Inverse Trig

What would you use to solve for x?

• Pythagorean Theorem

• Trig

• Inverse Trig

In this 45-45-90 triangle, I have been given the length of a leg.  How do I find the length of the hypotenuse?

• It is the same length as the given leg.

• Multiply that leg's length by √2.

• Multiply that leg's length by 2.

• Divide that leg's length by √2.

Which equation would be used to solve for x?

• x²+9²=13²

• sin^-1(13/9)

• sin(13)= 9/x

• sin^-1(9/13)

Which equation would be used to solve for x?

• x²+25²=32²

• cos(25)= x/32

• tan^-1(32/25)

• cos^-1(25/32)

If the leg of a 45-45-90 triangle is 7 cm long, then its hypotenuse is _____ cm.

• 7√2

• 49√2

• 7

• 7√7