1 / 8

Area of Triangles and Parallelograms: Theorem 100 and 101

Learn how to calculate the area of triangles and parallelograms using specific formulas. Practice finding areas with given measurements and solve geometry problems.

ninaf
Download Presentation

Area of Triangles and Parallelograms: Theorem 100 and 101

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Triangles and ParallelogramsLesson 11.2

  2. M 13cm 9cm 6cm H T Theorem 100: 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. M 13cm 9cm 6cm H T A You will receive one point for each line, plus the correct unit. Minimum 3 lines. A = bh = 13(6) = 78cm2

  4. Theorem 101: 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

  5. 15 x Find the area of this triangle. 12mm 8mm A = 48 mm2 Find the base of a triangle with an altitude of 15 and area 60. x = 8

  6. 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?

  7. 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

  8. Team Activity: Draw a parallelogram that has a perimeter of 40 units . What is its area? Which team created the parallelogram with the GREATEST area? What shape is it?

More Related