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8-4 Areas of Triangles

8-4 Areas of Triangles. 8-4 Areas of Triangles. From the Rectangle Area Formula, area formulas for right triangles and any triangle can be deduced. 8-4 Areas of Triangles. 8-4 Areas of Triangles. Right Triangle Area Formula

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8-4 Areas of Triangles

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  1. 8-4 Areas of Triangles

  2. 8-4 Areas of Triangles • From the Rectangle Area Formula, area formulas for right triangles and any triangle can be deduced.

  3. 8-4 Areas of Triangles

  4. 8-4 Areas of Triangles Right Triangle Area Formula The area of a right triangle is half the product of the lengths of its legs. A = ½ hb

  5. 8-4 Areas of Triangles What is the area of a right triangle with side lengths 8, 15 and 17 units? A = ½ hb = ½ (8)(15) = 60 units2 (Remember: The hypotenuse is the longest side in a right triangle!)

  6. 8-4 Areas of Triangles How would you compute the area of any of these triangles?

  7. 8-4 Areas of Triangles Triangle Area Formula The area of a triangle is half the product of the length of a side (the base) and the altitude (height) to that side. A = ½ hb

  8. 8-4 Areas of Triangles Find the area of each triangle. DPQS 15 units2 DPRS 6 units2 DPST 9 units2 DPQT 24 units2

  9. 8-4 Areas of Triangles What is the area of each of the triangles in the figure below? Each is 5 units2. (A = ½ hb = ½ (5) (2))

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