area of trapezoid
A=(a+b/2)h
the answer is c 20mm²
Which of the following expressions represents “5% of a number”?
2 answers:
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Answer:
- CD = 11 units
Step-by-step explanation:
<em>See the drawing attached</em>
<h3>Given</h3>- C is midpoint of AB
- B is between A and D
- AD = 15
- BD = 7
- Find CD
- CD = CB + BD =
- 1/2AB + BD =
- 1/2(AD - BD) + BD =
- 1/2(15 - 7) + 7 =
- 1/2(8) + 7 =
- 4 + 7 =
- 11
Answer:
Vertical angles are always congruent.
Step-by-step explanation:
Vertical angles are formed when two straight lines intersect each other, thereby forming two pairs of opposite angles, which are called vertical angles. Thus, a pair of these vertical angles formed are congruent to each other. So therefore, if two angles are said to be vertical angles, it follows that they are congruent to each other.
Using the diagram attached below, we can see two straight lines intersecting each other to form two pairs of vertical angles:
<a and <b,
<c and <d.
Thus, <a is congruent to <b, and <c is congruent to <d.
Therefore, the standby that is true about vertical angles is that:
Vertical angles are always congruent.
