You are right ! It is 8.246 and so on ;)
X is 35 degrees and Y is 70 degrees
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The answer is 15.
Answer: 280 cm
Step-by-step explanation:
The base of each of the congruent triangles ABD and CBD is BD= 28 cm. The height of each is the perpendicular 10cm.
A=(2)(bh/2) works out to A= bh since the 2/2 cancel
So 10cm × 28cm = 280cm²
The area of the cylinder is 490.09 ft squared