STEM 1st Semester Final review
standard equation of a circle?
(x-h)^2 + (y-k)^2 = r^2
midpoint formula
(x₁+x₂)/2, (y₁+y₂)/2
the product of the slope of two perpendicular lines is always..
-1
volume formula for a sphere
4/3πr^3
Definition of a square
A parallelogram with four congruent sides and four right angles.
Definition of a rectangle
A parallelogram with four right angles
Definition of a trapezoid
A quadrilateral with exactly one pair of parallel sides
Area of a circle
A=πr²
Circumference Formula
C=2 pi r
surface area formula for a cube
SA=6s^2
volume formula of a cone
V=1/3(π)(r)²(h)
volume formula for a cube
V=s^3
Volume formula for a cylinder
V=πr²h
Definition of a rhombus
a parallelogram with 4 congruent sides
law of cosines formula
a²=b²+c²-2(b)(c)Cos(A)
distance formula
d = √[( x₂ - x₁)² + (y₂ - y₁)²]
If two triangles are similar, then they are congruent
false
all acute triangles are similar
false
all isosceles triangles are similar
false
all right triangles are similar
false
if two pairs of corresponding sides are proportional, then the triangles are similar
false
The slopes of two perpendicular lines are..
opposite reciprocals
the slope of two parallel lines are..
the same
if two pairs of corresponding angles are congruent, then the triangles are similar
true
if two triangles are congruent, then they are similar
true