<span>trapezoid area = ((sum of the bases) ÷ 2) • height</span>
Answer:
B
Step-by-step explanation:
You have side EC=EA (S)
Angle ECD=BAE. (A)
AB=CD. (S)
So I think we should multiply 12 by 11/2 and


The answer is 66.
Hope this helps. (:
Step-by-step explanation:
sper că te-am ajutat
Answer:
21°
General Formulas and Concepts:
<u>Pre-Algebra</u>
Order of Operations: BPEMDAS
- Brackets
- Parenthesis
- Exponents
- Multiplication
- Division
- Addition
- Subtraction
Equality Properties
<u>Geometry</u>
- Vertical Angles - Angles that are directly opposite of each other are congruent
Step-by-step explanation:
<u>Step 1: Set Up Equation</u>
(x + 7)° = (5x - 49)°
<u>Step 2: Solve for </u><em><u>x</u></em>
- Subtract <em>x</em> on both sides: 7 = 4x - 49
- Add 49 on both sides: 56 = 4x
- Divide 4 on both sides: 14 = x
- Rewrite: x = 14
<u>Step 3: Find angle measure</u>
- Define: (x + 7)°
- Substitute in <em>x</em>: (14 + 7)°
- Add: 21°