Answer:
∠C = 90°
Step-by-step explanation:
The sum of the 3 angles in a triangle = 180°, thus
6x + 2x + 4x = 180, that is
12x = 180 ( divide both sides by 12 )
x = 15
Hence
∠C = 6x = 6 × 15 = 90°
Answer:
2827 cubic centimetre
Step-by-step explanation:
The cup is cylindrical in shape and it is full to the top.
The height of the cup is 15 cm and its diameter is 8 cm (radius = 4 cm).
The volume of a cylinder is given as:

where r = radius
h = height
The volume of the liquid in the cup is:

V = 2827.43 cubic centimetre ≅ 2827 cubic centimetre
Do you mean this number:

?
The we have to simplify the fraction part, since the nominator is bigger than the denominator.
How many denominators fit into the nominator? 20: 4=5
5! so

is simply 5 and we can add it to the main number:
175+5=180
Answer:
its=> 3×4=-3-6(use a caculator now)