Geo1.5 Formulas in Geometry
Find the perimeterand area of theright triangle.
perimeter = 
Area = 
units2
4
units
8
12
Find an expression for the perimeter of the 
rectangle below.
p = x2 + 3x units
p = (4x + 3) units
p = (2x + 6) units
p = (4x + 6) units
x
x + 3
Find an expression for the area 
of the rectangle below.
A = (4x + 6) units2
A = (x2 + 6) units2
A = (x2 + 3x) units2
A = (2x + 6) units2
x
x + 3
A polygon has vertices at     (0, 0), (-4, 0), (0, 8), and (-4, 8).
      Find the perimeter of this polygon.
units
  A polygon has vertices at     (0, 0), (-3, 0), (0, 9), and (-3, 9).
      Find the area of this polygon.
units2
The area of a triangle is 48 square centimeters.The base length is 12 cm.  What is the height of     the triangle? 
cm
?
height
The side of a square is 14 inches long.  What is     the area of the square?
56 in2
169 in2
28 in2
196 in2
A painting has 15 congruent rectangles, all     outlined in a red paint.  Each rectangle is     3 inches by 5 inches.  How many total inches     of red paint will be on the painting?     (no rectangles overlap)
inches
The area of a square is 400 square meters.       What is the side length of the square?
200 meters
20 meters
400
100 meters
10 meters
?
Use the Pythagorean Theorem to find the length
of the hypotenuse of the right triangle. 
hypotenuse = 
round to the nearest tenth
?
9 in
7
Use the Pythagorean Theorem to find the length
of the hypotenuse of the right triangle. 
9 in
hypotenuse = 
9 in
?
round to the nearest tenth
Use the Pythagorean Theorem to find the lengthof the hypotenuse then find the perimeter and areaof the triangle.
?
12 in
hypotenuse = 
5 in
Perimeter =
Find the length of the hypotenuse of the right triangle.
A
x = 
round to the nearest tenth.
x?
7
units
B
5
C
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