Trigonometry Concepts

Which ratios are less than or equal to 1 for acute angles?

• sine
• cosine
• tangent is always less than 1
• hypotenuse divided by a leg

Which statements are true for similar right triangles?

• Matching angles are equal
• Matching side ratios are equal
• All side lengths must be exactly equal
• Trigonometric ratios for matching angles match

Which are standard special angles often used in beginning trigonometry?

• 30°
• 45°
• 60°
• 73°

Which side names depend on the chosen acute angle?

• opposite
• adjacent
• hypotenuse
• right angle

Which angle measures can be acute angles in a right triangle?

• 30°
• 45°
• 60°
• 100°

Which angle measures are acute?

• 25°
• 89°
• 90°
• 120°

Which ratios use the hypotenuse?

• sine
• cosine
• tangent
• opposite ÷ adjacent only

Which statements are true about the hypotenuse of a right triangle?

• It is opposite the right angle
• It is the longest side
• It is always a vertical side
• It is one of the two legs