Square Area = s2 (s = side length)
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Bu səhifədəki naviqasiya:
Be careful when identifying the height of a triangle! The height is NEVER a side of a triangle unless the triangle is RIGHT.
Trapezoid Area = ½ h (b1 + b2)
Ex 3: Find the area of parallelogram ABCD
Ex 6: Find the area of the rhombus.
Square Area = s2 (s = side length)
Square Area = s2 (s = side length)
Rectangle Area = lw (l = length and w = width)
Triangle Area = ½bh (b = base and h = height)
Be careful when identifying the height of a triangle! The height is NEVER a side of a triangle unless the triangle is RIGHT.
a. A square whose sides have length 8 cm.
a. A square whose sides have length 8 cm.
b. A rectangle whose length is 5 m and width is 11 m.
b. A rectangle whose length is 5 m and width is 11 m.
c. A triangle whose side lengths are 3 in, 4 in, and 5 in.
c. A triangle whose side lengths are 3 in, 4 in, and 5 in.
a. A square with area 256 in2.
a. A square with area 256 in2.
b. A rectangle with area 345 ft and length 15 ft.
b. A rectangle with area 345 ft and length 15 ft.
c. A triangle with area 12 mm and a base length of 6 mm.
c. A triangle with area 12 mm and a base length of 6 mm.
Parallelogram Area = bh (b = base and h = height)
Parallelogram Area = bh (b = base and h = height)
Trapezoid Area = ½ h (b1 + b2)
Rhombus Area = ½d1d2 (d = diagonal)
You can justify the area formula for parallelograms as follows:
Ex 3: Find
the area of parallelogram ABCD
Ex 3: Find the area of parallelogram ABCD
Ex 5:The area of a trapezoid is 135 cm2, height is 9, and one bases is 11. Find the other base.
Ex 6: Find the area of the rhombus.
Ex 7: The area of a rhombus is 40 in2 and one of the diagonals is 8 in. Find the other diagonal.
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