Formulas
What is the formula for the area of a triangle?
a=1/2 b x h
Find the area of the triangle if the base is 11 cm and the height is 7.5 cm.
a= 1/2 (11 x 7.5)
=1/2 (82.5)
=41.25 cm2
Find the area of a parallelogram if the base is 10 cm and the height is 6 cm.
a= 10 x 6
a = 60 cm2
Find the area of a trapezoid if b1 is 13 cm, b2 is 5 cm, and the height is 11 cm.
a= 1/2(11)(13 +5)
=1/2 (11)(18)
=1/2 (198)
a = 99 cm2
What is Miss Bodenstadt's favorite color?
Blue
What is the formula for the area of a rectangle?
a= l x w
Find the area of the triangle if the height is 8 m and the base is 16.5 m.
a= 1/2 x (16.5 x 8)
= 1/2 x (32)
= 66 m 2
Find the area of a parallelogram if the base is 10.5 in. and and height is 10 in.
a= 10.5 x 10
a= 105 in2
Find the area of a trapezoid if b1 is 13 cm, b2 is 5 cm, and the height is 7 cm.
a= 1/2 (7) (13+5)
= 1/2 (7) (18)
= 1/2 (126)
a = 63 cm2
Who is Miss Bodenstadt's favorite singer?
Taylor Swift
(She's a swiftie not an Eilish)
What is the formula for the area of a parallelogram?
a = b x h
Find the area of a triangle if the base is 9 cm and and the height is 8.5 cm.
a = 1/2 (9 x 8.5)
=1/2 (76.5)
= 38.25 cm2
Find the area of a parallelogram if the base is 6 cm and the height is 5.5 cm.
a = 6 x 5.5
a = 33 cm2
Find the area of a trapezoid if b1 is 18 cm, b2 is 10 cm, and the height is 6 cm.
a= 1/2 (6) (18+10)
= 1/2 (6) (28)
= 1/2 (168)
=84 cm2
April 2
What is the formula for the area of a trapezoid (without decomposing)?
a= 1/2 h x (b1 +b2)
Find the area of a triangle if the height is 15 m and the base is 6.5 m.
a= 1/2 (6.5 x 15)
=1/2 (97.5)
=48.75 m2
Find the base of a parallelogram if the area if 90 cm2 and the height is 15 cm.
90 = b x 15
90/15=b
b = 6 cm
Find the area of a trapezoid if b1 is 6 m, b2 is 8 m, and the height is 4 m.
a= 1/2 (4) (8+6)
= 1/2 (4) (14)
= 1/2 (56)
=28 m2
What is Miss Bodenstadt's cats name?
Nala
What is the formula for the perimeter of a rectangle?
p= l + l + w + w
or
p=2l+2w
Find the height of a triangle is the area is 28 cm2 and the base is 8 cm.
28 = 1/2 (8) x (h)
28 = 4 x h
7=h
h= 7 cm2
Find the height of a parallelogram if the area is 104 in. and the base is 13 in.
104 = 13 x h
h = 104/13
h = 8 in.
Find the height of a trapezoid if the area is 99 cm2, b1 is 13 cm, and b2 is 5 cm.
99= 1/2 (h) (13+5)
99=1/2 (h) (18)
99= 9h
h=11 cm
Why is 6 afraid of 7?
because 7 ate 9