Today’s Objectives Module 19: Identify special right triangles Module 20: Area of regular polygons and circles and circle sectors.

Today’s ObjectivesToday’s ObjectivesModule 19:Module 19:

Identify special right trianglesIdentify special right triangles

Module 20:Module 20:

Area of regular polygons and Area of regular polygons and circles and circle sectorscircles and circle sectors

Right hand driving Right hand driving Systems of shared Systems of shared

intersections intersections One-way traffic circles One-way traffic circles One-way streets One-way streets Traffic signs Traffic signs Pavement marking Pavement marking Regulations against Regulations against

jaywalking jaywalking Taxi stands Taxi stands Off-street parking Off-street parking Driver’s licenses Driver’s licenses Vehicle registration Vehicle registration Traffic tickets Traffic tickets

Goal: find the area of the Goal: find the area of the circle. circle.

45°

The perimeter is 20 cm. The perimeter is 20 cm. Find the area.Find the area.

The perimeter is 24 cm. The perimeter is 24 cm. Find the area.Find the area.

The perimeter is 20 cm. Find The perimeter is 20 cm. Find the area. (using triangles)the area. (using triangles)

Find the area given the Find the area given the circumference is 22mmcircumference is 22mm

Find the area given the Find the area given the circumference is 30mmcircumference is 30mm

Goal: find the area of the Goal: find the area of the circle. circle.

45°

Goal: find the area of the Goal: find the area of the circle. circle.

20°

Today’s ObjectivesToday’s ObjectivesModule 19:Module 19:

Identify special right triangles Identify special right triangles needed for Mr. Field’s needed for Mr. Field’s presentation on circlespresentation on circles

Module 20:Module 20:

Area of regular polygons and Area of regular polygons and circles and circle sectorscircles and circle sectors