ANGLES

ANGLES

An angle is the space formed between two lines that meet.
There are different types of angles. Some of these include, acute angle, right angle, obtuse angle, straight angle and reflex angle. Angles are named based on their sizes. We use an instrument called a protractor to measure the size of an angle.

ACUTE ANGLE

An angle which measures less than 90 degrees is called an acute angle.

RIGHT ANGLE

Angles which measure 90 degrees are referred to as right angles.

OBTUSE ANGLE

Any angle which measures more than 90 degrees but less than 180 degrees is called an obtuse angle.

STRAIGHT ANGLE

An angle that measure 180 degrees is called a straight angle.

REFLEX ANGLE

If an angle measures more than 180 degrees but less than 360 degrees, it is called a reflex angle.



CULMINATING ACTIVITY (Assessment 1)

(a) Identify the angles depicted by teacher/student

(b) Use the mouse to illustrate the angle suggested by the teacher

(c) Complete the short quiz. (Good Luck!)