Question

lesson 2: drilling for understanding

1. by adding one line, change these non - right triangles into two right triangles. be sure to

indicate the location of the ( 90^{circ} ) angle.
a.
b.
c.

Explanation:

Step1: For triangle a

Draw a perpendicular line from the vertex (the top - most point) to the opposite side. This line will create two right - angled triangles. Mark the right - angle (90°) at the intersection of the drawn line and the opposite side.

Step2: For triangle b

Draw a perpendicular line from the vertex (the bottom - most point) to the opposite side. Mark the right - angle (90°) at the intersection of the drawn line and the opposite side.

Step3: For triangle c

Draw a perpendicular line from the vertex (the top - most point) to the opposite side. Mark the right - angle (90°) at the intersection of the drawn line and the opposite side.

Answer:

For triangle a: Draw a perpendicular from the top vertex to the opposite side and mark the 90° angle. For triangle b: Draw a perpendicular from the bottom vertex to the opposite side and mark the 90° angle. For triangle c: Draw a perpendicular from the top vertex to the opposite side and mark the 90° angle.