Answer:
Decagon
Step-by-step explanation:
Since the interior angle is 144 degree, each exterior angle is 180 - 144 = 36 degrees.
For any convex polygon (in particularly, for any regular polygon) the sum of exterior angles is 360 degrees.
Hence, the number of sides = the number of vertices = 360/36 = 10.
Answer. Your polygon is decagon with 10 sides (vertices).
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180=(12x+8)+(8x+12)
180=20+20x
-20. -20
160=20x
20. 20
X=8
B)8
Answer:
150
Step-by-step explanation:
Consider the figure as an isosceles triangle and a rectangle combined.
ISOSCELES TRIANGLE
A = 90
RECTANGLE
60 + 90 = 150
1135.246
Just make up a reasonable number no higher than 1144 and no lower than 145
Answer:
w = 2
Step-by-step explanation:
Step 1: Write equation
1.3(w + 4) = 2.1w + 3.6
Step 2: Solve for <em>w</em>
- Distribute 1.3: 1.3w + 5.2 = 2.1w + 3.6
- Subtract 1.3w on both sides: 5.2 = 0.8w + 3.6
- Subtract 3.6 on both sides: 1.6 = 0.8w
- Divide both sides by 0.8: 2 = w
- Rewrite: w = 2
Step 3: Check
<em>Plug in w to verify it's a solution.</em>
1.3(2 + 4) = 2.1(2) + 3.6
1.3(6) = 4.2 + 3.6
7.8 = 7.8