Measuring Angles
This type of angle is less than 90o
What is an acute angle?
What is the first thing you draw before using any protractor?
What is a baseline?
Complementary Angles add up to this total.
What is 90o?
A door opens 45°. What type of angle is this?
What is acute?
90 − 47 = ?
What is 43?
An angle measures 135o. What type of angle is it?
What is an obtuse angle?
To draw a 90o angle accurately, what must the baseline line up with on the protractor?
What is the zero line?
Supplementary Angles add up to this total
What is 180o?
A skateboard ramp creates a 120° angle with the ground. What type of angle is this?
What is obtuse?
180 − 136 = ?
What is 44?
When measuring an angle, this point must be placed exactly on the vertex
What is the centre of the protractor?
or
What is the crosshair?
If you draw a 160o angle, what type should it be?
What is obtuse?
One angle is 35o. It forms a right angle with another. What is the missing angle?
What is 55o?
Two roads meet forming a straight line. One angle is 95°. What is the other angle?
What is 85°?
360 − 125 = ?
What is 235?
An angle measures 210o. What type of angle is it?
What is a reflex angle?
You draw an angle and measure it. It is 87o instead of 90o. What should you check first?
What is the alignment of the protractor with the vertex and baseline?
Two angles form a straight line. One is 128o. What is the missing angle?
What is 52o?
A clock shows 3:00. What angle is formed between the hands?
What is 90°?
A shape has 4 right angles. What is the total of its interior angles?
What is 360°?
You measure an angle and get 40o, but it is clearly obtuse. What mistake did you likely make?
What is reading the wrong scale on the protractor?
You are asked to draw a reflex angle of 240o. What angle could you draw first and then extend?
What is 120o?
(Since 360 - 240 = 120)
DOUBLE JEPOARDY
Three angles sit in a straight line. Two are 40o and 65o. What is the third angle?
What is 75o?
A footballer kicks a ball creating a 30° angle from the ground. Another kick creates a 60° angle. Do these two angles form a complementary pair?
What is yes (because 30° + 60° = 90°)?
Half of 180° plus 15° = ?
What is 105°?