# Complementary & Supplementary Angles (Exploration)

## Complementary Angles

In the applet below, the

**red angle**and the**blue angle**are said to be**complementary angles**. Interact with this applet for a minute or two, and answer the questions that appear below it.## 1.

In your own words, describe what it means for 2 angles to be complementary angles.

## 2.

In the applet above, the **blue angle** is said to be a * complement *of the

**red angle**, and vice versa. Given this information, determine the

*complement*of a 40 degree angle.

## 3.

What is the complement of a 1-degree angle?

## 4.

What angle measure has a complement whose measure is equal to itself?

## Supplementary Angles

In the applet below, the

**pink angle**and the**blue angle**are said to be**supplementary angles**. Interact with this applet for a minute or two, and answer the questions that appear below it.## 1.

In your own words, describe what it means for 2 angles to be supplementary angles.

## 2.

In the applet above, the **blue angle** is said to be a * supplement *of the

**pink angle**, and vice versa. Given this information, determine the

*supplement*of a 130 degree angle.

## 3.

What is the supplement of a 1-degree angle?

## 4.

What angle measure has a supplement whose measure is equal to itself?

## Bonus: Practice

Move the points to change the angles. Work out the missing angles, then check your answer by ticking the "show" box.