Properties of Shapes Flashcards
1
Q
Sum of angles in a quadrilateral
A
360 degrees
2
Q
“Big Four” Parallelogram Properties
A
- Parallel opposite sides
- Equal opposite sides
- Equal opposite angles
- Diagonals bisect each other
3
Q
Rhombus Properties
A
- Four equal sides
- Diagonals intersect perpendicularly
- “Big Four”
4
Q
Rectangle Properties
A
- All 90 degree angles
- Diagonals are equal in length
- “Big Four”
5
Q
Square Properties
A
All properties of rhombuses and rectangles combined:
- Four equal sides
- Diagonals intersect perpendicularly
- All 90 degree angles
- Diagonals are equal in length
- “Big Four”
6
Q
Trapezoid Properties
A
- Exactly one pair of parallel sides
Symmetrical trapezoid: equal legs, equal angles on both sides, equal diagonals
7
Q
Three Pythagorean Triplets
A
3, 4, 5
5, 12, 13
8, 15, 17
8
Q
Sum of Angles in an n-sided Polygon
A
(n–2) * 180
9
Q
Sides of a 45-45-90 Triangle
A
1, 1, root 2
10
Q
Sides of a 30-60-90 Triangle
A
1, root 3, 2
11
Q
Area of a Square
A
A = s^2
12
Q
Area of a Quadrilateral
A
A = bh
13
Q
Area of a Trapezoid
A
A = average of two bases * height
14
Q
Circumference of a Circle
A
C = pi * d C = pi * 2r
15
Q
Area of a Circle
A
A = pi * r^2