Manipulating Angles and Area

Angles, Area

Manipulating The Triangle

Using the cursor, you can drag and move the point on the triangle. This will change the angles and even the side lengths that are given. 1. Can you create a right triangle? 2. Dragging the points can you make and equilateral triangle, all sides and angle must be congruent. 3. Can you create a scalene triangle with one obtuse angle in it? 4. Is it possible to have more than one right angle inside the triangle?

Rectangle manipulation

This quadrilateral has 4 points on it, all of which can be moved and altered to change the side lengths and area of the shape. 1. Can you create a square with an area of 16? 2. How does the scale work for this shape? 3. What is the smallest size it can be changed to? 4. Is it possible to create a triangle with the 4 points?


Out of the two shapes provided, which shape was the easiest to learn from and gave you new insight on angles and measurement?

Standards Targeted

3.MD.C.5.A, 3.MD.C.5.B, 3.MD.C.6, 3.MD.C.7.A, 3.MD.C.7.B, 3.MD.C.7.C, 3.MD.C.7.D, 4.MD.C.5.A, 4.MD.C.5.B, 4.MD.C.7