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- 148
- à 7.1ïFinding the Perimeter of Geometric Figures
- äïPlease find the Perimeter of the following geometric
- êêfigures.
- âëFind the perimeter of the given Rectangle.
-
-
- êêêë Perimeter = 6 + 2 + 6 + 2 = 16in.
- @fig101.bmp,25,118
- éSêè The Perimeter of a geometric figure is the total
- êêè distance around the figure. In order to find the
- êêè Perimeter of the given rectangle, you should add up
- êêè the lengths of all the sides. 6in. + 2in. + 6in. + 2in.
- êêè = 16in.ïThus, the Perimeter of this Rectangle is 16in.
-
- The Perimeter of any three sided figure (triangle) is the sum of the
- lengths of the three sides.ïThe Perimeter of any four sided figure
- êêè (quadrilateral) is the sum of the lengths of the four
- êêè sides.ïThe distance around a circle is called the
- êêè Circumference rather than the Perimeter and is found
- êêè by multiplying (π ≈ 3.14) times the diameter or by
- êêè multiplying "2" times (π ≈ 3.14) times the radius.
- @fig102.bmp,0,12
- @fig103.bmp,0,165
- 1èFind the Perimeter of the given Square (a Square has equal
- êêêsides and 90 degree angles).
-
- êêêêè A)ï8 cm.êêB) 16 cm.
-
- êêêêè C)ï12 cm.êë D) å of ç
- @fig104.bmp,25,229
- ü
-
-
- êêè4 cm. + 4 cm. + 4 cm. + 4 cm. = 16 cm.
- Ç B
- 2êFind the Perimeter of the given Quadrilateral (a
- êêêQuadrilateral is any four sided plane figure).
-
- êêêêè A)ï22 ft.êëB) 24 ft.
-
- êêêêè C)ï23 ft.êëD) å of ç
- @fig105.bmp,25,229
- ü
-
-
- êêï10 ft. + 3 ft. + 4 ft. + 6 ft. = 23 ft.
- Ç C
- 3èFind the Perimeter of the given Parallelogram (a parallel-
- êêêogram has opposite sides parallel and equal).
-
- êêêêè A)ï30 yds.êëB) 26 yds.
-
- êêêêè C)ï24 yds.êëD) å of ç
- @fig106.bmp,25,229
- ü
-
-
- êë 10 yds. + 5 yds. + 10 yds. + 5 yds. = 30 yds.
- Ç A
- 4èFind the Perimeter of the given Rhombus (a rhombus is a
- êêêparallelogram with all sides equal).
-
- êêêêè A)ï25 m.êêB) 30 m.
-
- êêêêè C)ï20 m.êêD) å of ç
- @fig107.bmp,25,229
- ü
-
-
- êêë5 m. + 5 m. + 5 m. + 5 m. = 20 m.
- Ç C
- 5èFind the Perimeter of the given Rectangle (a rectangle is
- êêêa parallelogram with four right angles).
-
- êêêêè A)ï54 mi.êë B) 36 mi.
-
- êêêêè C)ï44 mi.êë D) å of ç
- @fig108.bmp,25,229
- ü
-
-
- êê 14 mi. + 8 mi. + 14 mi. + 8 mi. =ï44 mi.
- Ç C
- 6êïFind the Perimeter of the given Triangle.
-
-
- êêêêè A)ï33 m.êêB) 26 m.
-
- êêêêè C)ï28 m.êêD) å of ç
- @fig109.bmp,25,229
- ü
-
-
- êêê12 m. + 16 m. + 5 m. = 33 m.
- Ç A
- 7èFind the Perimeter of the given Right Triangle (a right
- êêêtriangle has one 90 degree angle).
-
- êêêêè A)ï26 ft.êë B) 24 ft.
-
- êêêêè C)ï28 ft.êë D) å of ç
- @fig110.bmp,25,229
- ü
-
-
- êêë10 ft. + 8 ft. + 6 ft. = 24 ft.
- Ç B
- 8ïFind the Circumference of a Circle with Diameter of 12 inches.
-
-
- êêêêè A)ï40 in.êë B) 37.68 in.
-
- êêêêè C)ï38 in.êë D) å of ç
- @fig111.bmp,25,229
- ü
-
- êêë Circumference = π times Diameter.
- êêêï≈ (3.14)(12) = 37.68 inches.
- Ç B
- 9ë Find the Circumference of a Circle with Radius 3 cm.
-
-
- êêêêè A)ï18.84 cm.êèB) 18 cm.
-
- êêêêè C)ï21 cm.êë D) å of ç
- @fig112.bmp,25,229
- ü
-
- êêê Circumference = 2 ∙ π ∙ Radius.
- êêêê≈ 2 ∙ (3.14) ∙ 3
- êêêêï= 18.84 cm.
- Ç A
- 10êFind the Perimeter of the following figure.
-
-
- êêêêè A)ï40 in.êë B) 39.42 in.
-
- êêêêè C)ï38 in.êë D) å of ç
- @fig113.bmp,25,229
- üèFirst, find "half" the Circumference of a circle with a Diameter
- êïof 6 in.ïCircumferenceëπ∙Diameterë(3.14)(6)
- #êêë─────────────ï=ï──────────ï=ï───────── = 9.42
- êêêè2êêï2êê2
-
- Then, find the rectangular distances.ï12 in. + 6 in. + 12 in. = 30 in.
- ê The sum is the Perimeter.ï30 in. + 9.42 in. = 39.42 in.
- Ç B
-
-