Question

7. Find the value of x if LOST is a rectangle.​

Answer 1

Answer:

5x +4 + 3x +8 = 180⁰ (linear pair)

8x + 12 = 180⁰

8x = 180⁰-12⁰

8x = 168⁰

x = 168/8

x = 21⁰

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Answer 2

Answer:

$3x + 8 + 5x + 4 =180 \\ (straight \: line) \\ 8x + 12 = 180 \\ 8x = 180 - 12 \\ x = \frac{168}{8} \\ x = 21$

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