Measurement and Geometry Flashcards
Area of a square =
side x side
or
a²
Area of a rectangle =
a x b
Area of a parallelogram =
base x height
Area of a trapezoid =
A+b / 2 x h
Area of circle =
pi x radius²
Area of triangle =
1/2 bxh
What is a Platonic solid?
A polyhedron (a solid with flat sides) every race is a regular polygon of the same size and shape
How many faces does a tetrahedron, cube, octahedron and dodecahedron have?
Tetrahedron - 4
Cube - 6
Octahedron - 8
Dodecahedron- 12
What defines an obtuse triangle?
A triangle with an angle greater than 90*
What defines an Equilateral triangle?
Three equal sides and three equal angles
What defines an Isosceles triangle?
Two equal sides, two equal angles
What defines a Scalene triangle?
No equal sides or angles
Acute triangles have angles less than
90
Right angled triangles have angles that are
Always 90
The angles in triangles always add up to
180
