Answer:
x = 29
Angle A = 46.4°
Angle B = 43.6°
Step-by-step explanation:
Since it is a right angle triangle, we can find x from pythagoras theorem;
x = √(20² + 21²)
x = √(400 + 441)
x = √841
x = 29
Using trigonometric ratios we can find angles A and B.
Opposite is 20
Adjacent is 21
Thus; opp/adj = tan B
20/21 = tan B
B = tan^(-1) 0.9524
B = 43.6°
Sum of angles in a triangle is 180°. Thus;
A = 180 - (90 + 43.6)
A = 46.4°
Answer:
+4
Step-by-step explanation:
-5 - (-9)
-5 + 9
4
Answer: 150
Step-by-step explanation: cube has six sides, each 10 cm x 10 cm = 100 cm²
One sticker is 2 cm x 2 cm = 4 cm². One side needs 100/4 = 25 stickers
