Please answer quickly, thank you. 25 points.

Mathematics

1 answer:

den301095 [7]3 years ago

7 0

We can draw a square with given side many ways. Square means the sides are equal in length. The diagonals are equal and bisect each other in mutually perpendicular.One method is first we draw a line segment equal to AB. The end points are marked as A and B. From these points draw a perpendicular, using scale or compass mark the points on this perpendicular equal to AB. these points be C and D. Join these point C and D get CD. Now the square is ready. ABCD is the square.

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Find side x, giving your answer to 1 decimal place. 810 7 cm 40° Х

Andru [333]

Answer:

10.8

Step-by-step explanation:

By sine rule:

$\frac{x}{ \sin 81 \degree} = \frac{7}{ \sin 40 \degree} \\ \\ x = \frac{7 \sin 81 \degree}{ \sin 40 \degree} \\ \\ x = \frac{7 \times0.9876883406 }{0.6427876097} \\ \\ x = \frac{6.91381838}{0.6427876097} \\ \\ x = 10.755992 \\ \\ x \approx 10.8$