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11.2 Triangles and Parallelograms

11.2 Triangles and Parallelograms. M. 13cm. 6cm. 9cm. H. T. T100: The area of a parallelogram is equal to the product of the base and the height. A = bh. h. b. A. Find the area of MATH. Why is the Area = bh?. M. 13cm. 6cm. 9cm. H. T. A.

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11.2 Triangles and Parallelograms

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  1. 11.2 Triangles and Parallelograms

  2. M 13cm 6cm 9cm H T T100: The area of a parallelogram is equal to the product of the base and the height. A = bh h b A Find the area of MATH

  3. Why is the Area = bh?

  4. M 13cm 6cm 9cm H T A You will receive one point for each line, plus the correct unit. Minimum 3 lines. A = bh = 13(6) = 78cm2

  5. T101: The area of a triangle is equal to one-half the product of a base and the height (or altitude) for that base. A = bh Where b is the length of the base and h is the altitude. Altitude may be inside, outside or the leg of the triangle. The base may not always be at the bottom. h b

  6. 15 x Find the area of this triangle. 12mm 8mm Find the base of a triangle with an altitude of 15 and area 60.

  7. 15 x Find the base of a triangle with an altitude of 15 and area 60.

  8. 14 6 60˚ Find the area of a parallelogram whose sides are 14 and 6 and whose acute angle is 60˚. Draw and label. D U C K How will you find the height?

  9. 14 6 60˚ D U C K S Drop line DS to form a 30-60-90 triangle. Line DS is A = bh = 14( ) = 42

  10. The diagonals of a kite are 10 and 24. Find the kite’s area. Draw the shape, label. What shapes do you have to use? Write the formula needed and solve.

  11. Assignment: Make your own area problem! Come up with creative picture (ex: fish, bird, house) that involves at least 4 different shapes (circles, rectangles, parallelograms, triangles). Write a rough draft and then a final draft on the construction paper. Leave room on your final draft for someone to solve your problem. You have 15 minutes to come up with the problem When finished: Pass your problem to the person behind you to calculate the area!

  12. Get the homework done so you don’t have any over the break! Pg 519 #2-20 Evens

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