Answer:
60cm³
Step-by-step explanation:
Pic:
V = 1/3 × 4^2 × 3 + 4^3
V = 16 + 64
V = 80
words:
d = 12, r = 6
SA = 4 × pi × 6^2
SA = 144pi
V = 4/3 × pi × 6^3
V = 288pi
SA to V is 1 to 2 (1:2)
Answer: C
<BFE is 148 degrees
Step-by-step explanation:
We have angles <BFC (57 degrees) and <CFD (34 degrees), but what is <DFE?
1. The angle symbol in the vertexes shows that <BFC is congruent to <DFE, meaning that they are the same
2. Knowing this, we can safely say that <DFE is equal to 57 degrees because <BFC is also 57 degrees.
3. Now, we have all the angles we need to find out <BFE.
4. <BFC+<CFD+<DFE=<BFE
5. Substitute to get
57+34+57=<BFE
91+57=<BFE
148=<BFE
6. Now we know that the answer is 148 degrees.
Answer:
B) x = 2√2, y = 2
Step-by-step explanation:
The easiest way to solve this is to see that because one corner is 90 degrees, and the other 45, then the third one must also be 45. This means that the two sides on the right angle are the same length, so y = 2.
With that then, you can use the Pythagorean theorem to solve for x:
So the correct answer is b. x is equal to two root two, and y is equal to two.
Fichas escolares de matemáticas. Los números uno, dos y tres.