Proving Why the Angles of a Triangle Have a Sum of 180 Degrees

What materials are required to perform the triangle angle sum proof activity?

• A ruler, a compass, and a set square

• A piece of paper, a pen, and a glue stick

• A calculator, a protractor, and a compass

• A piece of paper, a pencil, a ruler, and a pair of scissors

What is the first step in the triangle angle sum proof activity?

• Label the angles of the triangle

• Draw a triangle using a ruler

• Cut out the triangle

• Tear off the angles of the triangle

After cutting out the triangle, what should you do next?

• Tear off each of the angles

• Fold the triangle in half

• Measure the angles with a protractor

• Label the sides of the triangle

How do you arrange the torn-off angles to prove the angle sum property?

• Stack them on top of each other

• Connect them at their vertices to form a straight line

• Align them to form a circle

• Place them randomly on the table

What does the arrangement of the angles demonstrate about the sum of angles in a triangle?

• They form a 90-degree angle

• They form a 360-degree circle

• They form a 180-degree straight line

• They form a 270-degree angle