Answer:
x = 90 and y = 43
Step-by-step explanation:
Since AB = AC then the triangle is isosceles and AD is a perpendicular bisector, thus
x = 90
and the base angles are congruent, thus ∠B = ∠C = 47
The sum of the angles in a triangle = 180°
Subtract the sum of the known angles from 180 for value of y
y = 180 - (90 + 47) = 180 - 137 = 43
Answer: 21 units²
Step-by-step explanation:
Since there is a pair of parallel sides, this figures is a trapezoid. The formula for the area of a trapezoid is , where a and b are the parallel sides and h is the height.
Here, a and b are 5 and 9, while 3 is the height. Let's put all 3 values into the formula.
<em> [Adding in the parentheses]</em>
<em>[Multiplying one-half by 14]</em>
<em /> <em>[Multiplying 7 and 3]</em>
<em />
The area is 21 units².
Answer:
B would be the answer.
Step-by-step explanation:
Use what they said. All angles in a triangle would sum to 180 degrees.
So based on that, 107 + 33 + <x = 180
140 + <x = 180
<x would then be 40 degrees
The difference between the percentages is 10%
Answer:
Equality Sign
Step-by-step explanation:
A child may be at educational risk if he is unable to use the equality sign as it is the basis for comparison of numbers.
Once a child can determine if two numbers are the same, we can then proceed to introduce comparisons of numbers. That is, either it is more than a stated number or less.
For example,
If number of apples=6, a child who understands this will know if 5 apples are less or more as appropriate.