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Math
Algebra
Pre Algebra
**7th Grade Math Unit 7 Angles, Area, Geometry
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Terms in this set (30)
Surface Area
Sum of all the areas of the faces of a three-dimensional solid.
Diameter
Line segment crossing the center of a circle, with end points on the circle
Equilateral
Polygon with all congruent sides
Radius
Line segment from the center to the edge of a circle
Adjacent Angles
Two angles that share a common side and have the same vertex
Scalene
Polygon with no congruent sides
Isosceles
Polygon with two congruent sides
Volume
Space inside a three-dimensional figure
Vertical Angles
Angles formed by two intersecting lines and are opposite each other
Complementary Angles
Two angles whose sum equals 90 degrees
Supplementary Angles
Two angles whose sum is 180 degrees
Perimeter
Distance around a closed two-dimensional figure
Circumference
Distance around a circle
Area
Space inside a two-dimensional figure
Vertex/Vertices
The common endpoint of the two rays that form an angle.
Circumference Formula
c=2∏r,
C =∏d
Area of a Circle Formula
A = πr²
Congruent
Having the same size and shape
Obtuse Angle
An angle that measures between 90 and 180 degrees.
Acute Angle
An angle whose measure is less than 90 degrees
Right Angle
an angle that measures 90 degrees
Revolution
Movement of wheel, one complete circle
Sum
Answer to an addition problem
Product
Answer to a multiplication problem
Difference
Answer to a subtraction problem
Quotient
Answer to a division problem
Parallel Lines
Lines that never intersect
Transversal
Line that intersects two or more lines
Equation
Mathematical sentence that contains an equals sign.
Evaluate
Find the value of a numerical or algebraic expression
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Verified questions
PREALGEBRA
A cylindrical swimming pool has a circumference of $18 \pi$ feet and a height of 4 feet. About how many liters of water are needed to fill the swimming pool to 85% of its total volume? Justify your answer. $\left(1 \mathrm{ft}^{3} \approx 28.3 \mathrm{L}\right)$
PREALGEBRA
Describe how you could find the original weight of the sled using only arithmetic.
PREALGEBRA
Javier bought 48 sports cards at a yard sale. Of the cards, $$ \frac{3}{8} $$ were baseball cards. How many cards were baseball cards?
PREALGEBRA
Amy can run $$ \frac{1}{10} $$ mile per minute. How many minutes will it take Amy to run 3 miles?