Finding Area of Regular Figures Using Apothem

Which is the radius?

• AD

• AB

• CD

• CB

Which is the apothem?

• AD

• AB

• CD

• CB

What is the formula for the central angle?

• (n-2)180

• (n-2)180/n

• 360/n

• 180/n

What is the measure of the central angle of this polygon?

• 45^o

• 60^o

• 30^o

• 22.5^o

What is the perimeter of this polygon?

• 72 units

• 84 units

• 60 units

• 96 units

Find the length of the apothem.

• 6 units

• 2.5 units

• 14.5 units

• 15.7 units

What is the formula to find the area of a regular polygon?

• A = bh/2

• A = 1/2ap

• A = sp/2

• A = s+pa/2

Find the area of this regular octagon.

• 1392 units²

• 696 units²

• 576 units²

• 720 units²

Review: what is the area of a circle with radius 10m?

• 10π m²

• 20π m²

• 400π m²

• 100π m²

Find the area

• 96 cm²
• 48 cm²
• 36 cm²
• 48 cm