grade 8 math chart cessily flores 2 nd pd p.i.t. perimeter: the outside of the object square p=4s...
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Grade 8 Math Chart
Cessily Flores2nd pd P.I.T
Perimeter: The outside of the object
Square• P=4s
Rectangle• P=2l=2w or P=2(l+w)
Word Problem: What is the perimeter?
A.45B.39C.60D.34 • 12 in
• 5in
Word Problem:
If the side is 9.25. What is the perimeter?
• A. 38• B.30• C.28.5• D.40
Circumference: All around the circle
CircleC=2r
C=2r or C=d
Word Problem:
The diameter is 13. What is the circumference?
• A. 40.82• B.38• C.12.25• D.41.30
Area: The inside of the object
Square A=s²
TriangleA=½bh or A=bh÷2
Circle A=r²
RectangleA=lw or A=bh
TrapezoidA=½(b¹+b²)h
Word Problem:• Find the area of the triangle.
• A. 30• B. 22 • C. 22.5• D. 19 h=6
7.5
Word Problem:
If the length is 10 and the width is 23 what is the area?
• A.20• B.230• C.33• D.55
Word Problem:
• A.121• B.22• C.44• D.211
• If the side length is 11. What's the area?
Word Problem:
What is the area?
10
6
• A.25• B.192• C.16• D.384
• h=24
Word Problem:
• If the diameter is 3. What is the area?
• A.7.065• B.9.24• C.765• D.8.0
Surface Area: The inside of a three-dimensional shape.Total is all the of the shape.
Lateral is only the sides.
Cube(total) S=6s²
Pyramid(total)S=½Pl+B
Pyramid(lateral)S=½Pl
Prism(total)S=Ph+2B
Prism(lateral)S=Ph
Cylinder(lateral)S=2rh
Cylinder(total)S=2rh+2r² or S=2r(h+r)
Word Problem:
Word Problem:
• Find the lateral surface area of the prism.
Word Problem:Find the surface area of the prism.
Volume
PrismV=Bh
Cylinder V=Bh
Pyramid V=¹/³Bh
Cone V=¹/³Bh
SphereV=1/3r³
Word Problem:
Pi
=3.14 or =22/7
Pythagorean Theorem:
a²+b²=c²
Simple Interest Formula:
I=prt
P represents the Perimeter of the Base of a three-dimensional figure.
B represents the area of the Base of a three dimensional figure.
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