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1.
Acute Triangle (named for its angles): a triangle where all 3 angles are acute (less than 90°)

2.
Center of a Circle: point in the middle of the circle

3.
Chord: any line segment that connects 2 points on a circle

4.
Circle: closed plane figure made up of all the points that are the same distance from the center

5.
Diameter: any line segment through the center that connects 2 points on a circle

6.
Equilateral Triangle (named for its sides): a triangle with all sides that are the same length

7.
How are quadrilaterals named?: Named by their angles or pairs of sides

8.
Isosceles Triangle (named for its sides): a triangle with at least 2 sides the same length

9.
Obtuse Triangle (named for its angles): a triangle where 1 angle is obtuse (greater than 90°)

10.
Parallelogram: quadrilateral with both pairs of opposite sides parallel

11.
Radius: any line segment that connects the center to a point on the circle

12.
Rectangle: parallelogram (quadril) with 4 right angles

13.
Rhombus: parallelogram (quadril) with 4 sides the same length (slanted square)

14.
Right Triangle (named for its angles): a triangle with 1 angle equal to a right angle (90°)

15.
Scalene Triangle (named for its sides): a triangle with none of its sides the same length

16.
Square: parallelogram (quadril) with 4 right angles and all 4 sides are the same length

17.
Trapezoid: quadrilateral with 1 pair of parallel sides (the other sides will intersect)

18.
What degrees should all the angles in a circle measure?: 360°

19.
What is the sum of all the angles in a quadrilateral?: 360° is the sum of the angles in a quadrilateral

20.
What is the sum of all the angles in a triangle?: 180°

## Grade 4 - Geometry (Lessons 4-5)Study online at quizlet.com/_158g8 |

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