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Formulas
Triangle
Parallelograms
Trapezoids
Miscellaneous
100

What is the formula for the area of a triangle?

a=1/2 b x h

100

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

100

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

100

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


100

What is Miss Bodenstadt's favorite color?

Blue 

200

What is the formula for the area of a rectangle?

a= l x w

200

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

200

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

200

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

200

Who is Miss Bodenstadt's favorite singer?

Taylor Swift 

(She's a swiftie not an Eilish)

300

What is the formula for the area of a parallelogram?

a = b x h

300

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

300

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

300

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


300
When do we come back from Spring Break?

April 2

400

What is the formula for the area of a trapezoid (without decomposing)?

a= 1/2 h x (b1 +b2)

400

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

400

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

400

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

400

What is Miss Bodenstadt's cats name?

Nala

500

What is the formula for the perimeter of a rectangle?

p= l + l + w + w

or 

p=2l+2w

500

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

500

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.

500

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

500

Why is 6 afraid of 7?

because 7 ate 9