The pic has 4 lines of symmetry and has rotational symmetry
Angle of rotation = 360/4 = 90 degrees
Answer:
10 inches
Step-by-step explanation:
The formula for the triangle area is the following:
A = b * h / 2
Where b is the length of the base side and h is the height.
So, as the height is 4 less than the base, we have that:
h = b - 4
Using this value in the area equation, we have that:
A = b * (b - 4) / 2
30 = (b^2 - 4b) / 2
b^2 - 4b = 60
b^2 - 4b - 60 = 0
Using Bhaskara's formula to solve the quadratic equation, we have:
Delta = 4^2 + 4*60 = 256
sqrt(Delta) = 16
b1 = (4 + 16)/2 = 10
b2 = (4 - 16)/2 = -6 (negative value does not fit for this problem)
So the length of the base is 10 inches.
You can write (x+2) divided by (x-1)
Don’t write ‘divided by’ though, just use the division symbol instead
They're all simple.
150 = 25r
The r is multiplied for 25, so we should know what r equals to when it's not multiplied (1r).
So divide both terms for 25.
150/25 = 25r/25
6 = r
r = 6 <- answer
38 = 4p
Same thing here (divide both terms for 4)
38/4 = 4p/4
38/4 = p
p = 38/4 and simplify p = 19/2 <- answer
18 = a/20
We have a fraction, and we have to "delete" it.
There are two ways.
First one: multiply both terms for the denominator of the fraction.
18*20 = a/20 * 20
360 = a
a = 360 <- answer
Second way.
Take the two fractions to the common denominator (20) and do the LCM.
360/20 = a/20. Multiply both for 20
360 = a
a = 360
0 = 10x
0/10 = 10x/10
x = 0 <- answer
Answer:
a straight line
Step-by-step explanation:
<u><em>The complete question is</em></u>
Which has a measure that is equal to the sum of the measures of the interior angles of a triangle?
A) a straight line
B) a circle
C) a right angle
D) an obtuse angle
we know that
The sum of the interior angles in any triangle must be equal to 180 degrees
so
Verify all the options
Option A) a straight line
The measure of the angle on a straight line is equal to 180 degrees.
Option B) a circle
The central angle of a circle is equal to 360 degrees
Option C) a right angle
The measure of a right angle is 90 degrees
Option D) an obtuse angle
An obtuse angle is greater than 90 degrees but less than 180 degrees
therefore
The answer is a straight line
