• demonstrate the use of trigonometric ratios (sine, cosine, and tangent) in solving right triangles

In the following triangle, if you wanted the length of a, which ratio would you use? Could you use another ratio? What is the length of b?

• calculate an unknown side or an unknown angle in a right triangle, using appropriate technology

Jenna walked across a rectangular schoolyard from one corner to the opposite corner. If the schoolyard is 40 m by 60 m, at what angle, with respect to the longer side, did
she walk?

A 10-metre ladder is leaning against a building. The angle between the ladder and the ground is 65°. How far is the top of the ladder from the ground?