2. Perimeter - the distance around a figure 6 cm 4 cm You can find the perimeter of any polygon by adding the lengths of all its sides. 4 cm + 4 cm + 6 cm = 14 cm Perimeter = 14 cm

3. Find the perimeter. 1 cm 10 cm 3 cm 4 cm 3 cm + 10 cm + 1 cm + 4 cm + 4 cm + 1 cm + 10 cm = 33 cm Perimeter = 33 cm

4. You can find the perimeter of a regular polygon by multiplying the length of one side by the number of sides. 7 cm 7 cm x 6 = 42 cm Perimeter = 42 cm 6 cm 6 cm x 5 = 30 cm Perimeter = 30 cm

5. 12 mm 8 cm 12 mm x 3 = 36 mm 8 cm x 4 = 32 cm Remember: a regular polygon has equal sides and equal angles Perimeter = 36 mm Perimeter = 32 mm

6. The perimeter (P) of a rectangle equals 2 times the sum of the length (l) and the width (w). P = 2 x (l + w) 10 cm 5 cm P = 2 x (10 + 5) P = 2 x 15 P = 30 cm l = 10 cm w = 5 cm

8. Area - measure of the surface of a region in square units. Examples of UnitsSquare Units mm mm x mm = mm 2 cm cm x cm = cm 2 m m x m = m 2 in in x in = in 2 ft ft x ft = ft 2 yd yd x yd = yd 2

9. You can use this formula to find the area of a rectangle. Area = length x width A = l x w 10 cm length (l) 5 cm width (w) A = 10 cm x 5 cm A = 50 cm 2 The area is 50 cm 2.

10. There is a special formula for the area of a square. A = s x s = s 2 A = s 2 A = 5 cm x 5 cm = 5 2 cm 2 A = 25 cm 2 (s = side) 5 cm The area is 25 cm 2.

11. You can use the base and height to find the area of a right triangle. A = 1/2 x (b x h) A = 1/2 x (6 x 4) A = 1/2 x (24) A = 12 in 2 Remember: solve inside the parenthesis first height (h) 4 in base (b) 6 in Math Tip: The height is always perpendicular to the base. The area is 12 in 2.

12. You can use the formula A = 1/2 x (b x h) to find the area of any triangle. Math Tip: The height is always perpendicular to the base. base (b) 4 cm height (h) 10 cm A = 1/2 x (b x h) A = 1/2 x (4 x 10) A = 1/2 x (40) A = 20 cm 2 The area is 20 cm 2.

13. You can use a formula to find the area of any parallelogram. Slide B A P ABP to DCM D M C A B C D 5 ft 12 ft height (h) 5 ft You can use this formula to find the area of a parallelogram: base (b) 12 ft A = b x h A = 12 ft x 5 ft A = 60 ft 2 Area of rectangle APMD: A = 12 ft x 5 ft A = 60 ft 2