Discovering Geometry

Find the missing side.

• 9
• 41
• 6.4
• 3

Find the missing side.

• 48
• 108
• 83.6
• 72

A triangle has side lengths:
5, 14, 12.  Is this triangle a right triangle, an acute triangle, or an obtuse triangle?

• right
• acute
• obtuse

A triangle has side lengths:
20, 21, 28.  Is this triangle a right triangle, an acute triangle, or an obtuse triangle?

• right
• acute
• obtuse

Find x.

• 6
• 6√3
• 6√2
• 12√3

Find c.

• 18
• 9√3
• 9√2
• 9

Find x.

• 8.9
• 8.0
• 10.4
• 10.8

Find x to the nearest degree.

• 57
• 55
• 33
• 29

If a 24-foot ladder makes a 58° angle with the ground, how many feet up a wall will it reach? Round your answer to the nearest tenth.

• 20.4
• 20.8
• 38.4
• 12.7

Find the angle of elevation of the sun if a building 125 feet tall casts a shadow 196 feet long. Round to the nearest degree.

• 33
• 64
• 50