# Sine, Cosine, Tangent 0 - 90°

Control the angle at the centre.
Notice how the red, green, blue line segments get bigger/smaller.

## 1.

At what angle does the green line segment become longer than the red line segment?

## 2.

At what angle does the blue line segment become longer than the red line segment?

## 3.

Given that the angle permitted ranges from zero to 90°, whats the shortest/longest green line segment?

## 4.

What's the shortest/longest red line segment?

## 5.

What's the shortest/longest blue line segment?

## 6.

How many right angled triangles are in the diagram?

## 7.

What does Pythagoras' Theorem say about those right angled triangle(s)?