Geometry

Question 0

Triangle side lengths rule

Answer 0

Third side must be less than the sum of the other sides. Third side must also be greater than the difference of the other to sides.

Question 1

Isosceles right triangle rules

Answer 1

45-45-90 degree isosceles right triangle has side ratios of a:a:root(a)

30-60-90 degree isosceles right triangle has side ratios of a:2a:aroot(3)

Question 2

Quadrilateral facts

Answer 2

Have 4 sides, all angles = 360 degrees.

Question 3

Parallelogram facts

Answer 3

• Opposite sides are equal and paralles.
• opposite angles are equal
• adjacent angles add up to 180 degrees
• area=bh
• perimeter=2(b+h)

Question 4

Circle facts

Answer 4

C=pie(r)
A=pie(r)squared.
The relation of arc to circumference, sector to area and arc degrees to 360 degrees are all the same.

Question 5

Rectangular solid surface area.

Answer 5

2(lw+lh+wh)

Cubes are: 6(s)squared

Question 6

Slope

Answer 6

Rise/run=y2-y1/x2-x1

Question 7

Line equation

Answer 7

y=mx+b

Question 8

Area of equilateral triangle=

Answer 8

S(squared)root(3)/4