7th Grade Math Definitions Page 2
ADVERTISEMENT
1
2
3
4Triangles
Scalene Triangle: A triangle with no congruent sides or angles.
Isosceles Triangle: A triangle with two congruent sides or two congruent angles.
Equilateral Triangle: A triangle with all sides congruent and all angles congruent (60 ).
Acute Triangle: A triangle with all angles measuring less than 90 .
Obtuse Triangle: A triangle containing one obtuse angle and two acute angles.
Right Triangle: A triangle containing a right angle and two acute angles.
Quadrilaterals
Parallelogram: A quadrilateral with two pair of parallel sides.
Rectangle: A parallelogram with four right angles.
Square: A rectangle with four congruent sides.
Rhombus: A parallelogram with all sides congruent.
Trapezoid: A quadrilateral with exactly one pair of parallel sides.
Area & Perimeter
Perimeter: The distance around a polygon.
Area: The number of square units needed to cover a given surface.
Transformations
Translation: The movement (slide) of a figure along a straight line without turning.
Rotation: The figure turns around a fixed point.
Reflection: The figure flips across a line of reflection, creating a mirror image.
Exponents
4
4
4
4
= 4 x 4 x 4 x 4 = 256
3
= 3 x 3 x 3 x 3 = 81
2
= 2 x 2 x 2 x 2 = 16
3
3
3
4
= 4 x 4 x 4
= 64
3
= 3 x 3 x 3
= 27
2
= 2 x 2 x 2
=
8
2
2
2
4
= 4 x 4
= 16
3
= 3 x 3
=
9
2
= 2 x 2
=
4
1
1
1
4
=
4
3
=
3
2
=
2
0
0
0
4
=
1
3
=
1
2
=
1
ADVERTISEMENT
0 votes
Related Articles
Related forms
Related Categories
Parent category: Education