A slideshow, a karaoke song to sing along to, and a short multiple-choice quiz on the topic of measurement and the tools that can be used to measure things, depending on the purpose, e.g., temperature, length, mass, angle, time, etc.

Test your knowledge of the missing angle measure.

Given two triangles, determine whether they are congruent and use that to find missing angle measures. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Use trigonometry to determie the angle measures.

Test your knowledge of using the law of sines to determine angle measures.

Explains step by step, supported by pictures, how to use a clinometer to measure the height of a tall object.

Find missing angle measures in quadrilaterals.

Given two triangles, determine whether they are congruent and use that to find missing angle measures.

This interactive demonstrates how to bisect an angle.

In this Cyberchase video segment, Harry tries to snowboard and learns how to measure and identify many common angles.

This task challenges a student to demonstrate understanding of the concept of measurement.

Students construct a line parallel to the base of a triangle and measure the angles formed. They use the construction to prove that the sum of the measures of the interior angles of a triangle is 180 degrees.

Students will play learning games to explore area, measurement, and angles.

In this activity, students will investigate properties of angles and arcs formed when chords, secants, and tangents intersect and intercept arcs in a circle. They discover several important theorems concerning circles and arc sizes. They...

Students investigate the properties of angles inscribed in a circle. They use the drawing and measurement tools of Cabri Jr. to draw and measure certain angles, and establish the relationship between angles that intercept the same arc.

Try these three problems about finding the measures of different angles that arise from diagrams involving parallel lines and transversals. Detailed solutions are written out for these three problems of moderate difficulty.

Using Cabri Jr. to explore the connection between central and inscribed angles along with their arc measure.

Students will play interactive games to identify types of angles and measure the angles.

In this activity, students investigate the sum of the measures of the interior angles of a triangle. They will explore interior angles, and their relationship with the exterior angles of a triangle.

This activity will allow students to use Cabri Jr. to find the sum of the measures of interior angles of convex polygons and visually see how the Interior Angle Sum Theorem works.

Students will expore the interior and exterior angle of 3 polygons and develop the formula to calculate the sum of degrees without the measurement of the angles being taken.

Explore opposite angles by chosing the appropriate angle for the missing degree of measure.

In this task, 8th graders are presented with a drawing of two parallel lines connected through two line segments. They are given the measures of two angles and are asked to find a third. Aligns with 8.G.A.5.

This site provides practice problems for calculating central angles and calculating arc length.