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how do we name shapes?
how do we name shapes?
Correct Names for this shape above: ABCD, BCDA, CDAB, DABC, DCBA, CBAD, BADC, ADCB
how do we name angles?
how do we name angles?
Naming angles is very much like naming shapes. The other thing to remember is to use the angle symbol (∠) before naming the angle with the letters provided.
The actual point / vertex at where the two arms meet, must be the MIDDLE letter of your named angle.
HOW DO WE MEASURE ANGLES?
HOW DO WE MEASURE ANGLES?
Watch this video to learn how to measure angles using a protractor.
Angles are measured in degrees. We show degrees as the unit ° when writing the number of degrees for an angle.
Here are some common angles with their degree measures.
THREE MAIN TYPES OF ANGLES...
THREE MAIN TYPES OF ANGLES...
STRAIGHT ANGLE
STRAIGHT ANGLE
A straight angle is formed when two rays connect to form a straight line.
REVOLUTION
REVOLUTION
When you take one side of your angle and rotate it all the way around, back to where it started, you get a 360° angle.
RIGHT ANGLE
RIGHT ANGLE
A 90° angle is also called a right angle. This is one of the most common that we see in constructions all around us.
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