The video tutorial from MathsMaster.org teaches how to estimate the size of angles quickly and accurately. Estimation is a useful skill for checking the sensibility of answers when measuring or drawing angles. The tutorial emphasizes the importance of understanding key angle diagrams, such as right angles and full turns, to make accurate estimations. Through practical examples, viewers learn to estimate angles by comparing them to known diagrams and using techniques like identifying fractions of right angles. The video concludes with a comprehensive example, reinforcing the estimation techniques discussed.

Why is estimating angles useful?

• To get an exact answer quickly

• To make math more difficult

• To check if your answers are reasonable

• To avoid using a protractor

What is the degree measure of a right angle?

• 90°

• 45°

• 180°

• 270°

What is the degree measure of a full turn?

• 180°

• 360°

• 90°

• 270°

What is the degree measure of 3/4 of a turn?

• 180°

• 270°

• 360°

• 450°

What is the benefit of knowing key angle diagrams well?

• It allows for exact calculations

• It eliminates the need for a ruler

• It helps in quick and accurate estimation

• It makes drawing angles easier

What is the degree measure of half a turn?

• 180°

• 90°

• 360°

• 270°

What is the degree measure of a quarter turn?

• 180°

• 45°

• 90°

• 135°

What is the degree measure of an angle that is 1/4 of a full turn?

• 135°

• 90°

• 45°

• 180°

What is the degree measure of an angle that is 1/2 of a full turn?

• 90°

• 270°

• 180°

• 360°

If an angle is slightly smaller than a right angle, what could be a reasonable estimate?

• 110°

• 100°

• 80°

• 70°