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All Geometry math games
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Identify missing angle in triangle
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Identify missing angle in triangle with variable
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Identify missing angle in quadrilateral
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Identify missing side in triangle
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Identify missing side in triangle with variable
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Area of triangle
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Identify side of triangle given area
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Area of quadrilateral
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Identify side of quadrilateral given area
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Area of circle given radius
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Area of circle given circumference
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Circumference of a circle given radius
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Radius of a circle given circumference
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Volume of sphere, cone, cylinder
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Volume of cuboid
- All Geometry math games
- Identify missing angle in triangle
- Identify missing angle in triangle with variable
-
Identify missing angle in quadrilateral
- Identify missing side in triangle
- Identify missing side in triangle with variable
- Area of triangle
- Identify side of triangle given area
- Area of quadrilateral
- Identify side of quadrilateral given area
- Area of circle given radius
- Area of circle given circumference
- Circumference of a circle given radius
- Radius of a circle given circumference
- Volume of sphere, cone, cylinder
- Volume of cuboid
The value of the angle of the trapezoid is ?
The angles within a quadrilateral add up to 360°. If you can determine the value of 3 of the angles within a quadrilateral, the 4th angle can be calculated by determining the sum of the 3 angles and subtracting that value from 360
For example, if a trapezoid has 3 angles that measure 70°, 120°, and 90°
- Find the sum of the 3 angles, or 280°
- Subtract 280° from 360°, or 80°