Problem 1) The triangles are similar because of the AA (angle angle) Similarity Theorem. The first A is the pair of congruent 39 degree angles. The second pair is unmarked, but look at where the triangles meet. They form a pair of vertical angles which are congruent. So we have two pairs of congruent angles allowing us to use the AA Similarity Theorem.
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Problem 2) We can use the SAS (Side Angle Side) Similarity Theorem to prove that these two triangles are similar. The angles are congruent. They are both 29 degrees. So that checks off the "A" portion of SAS. Then notice how the bottom sides are 32 and 64 for the small and large triangle respectively. They form the ratio 32/64 = 1/2, ie the smaller triangle's side is 1/2 as long as the longer counter part. Similarly, 8/16 = 1/2 as well. The ratio is constant at 1/2. This allows us to use the other "S" portions of SAS.
Answer:
C. Triangular pyramid
Four base vertices and the upper peak vertice
15 even.
A good way to look at it is a clock. The 3 means 15 minutes and the 6 means 30 minutes.
6 divided by 3 = 2.
Hope this helps and makes sense!
This is area of a circle.
A = π

FM = π

AM = π

Since π will cancel itself out for both, you only need to compare the square of 40 to 4.

= 1600

= 16
Thus, 1600 is 100 times greater than 16.
1600 * 3.14 = 5024
16 * 3.14 = 50.24
100 times more area. This is because 40 is 10 times greater than 4 and squaring it creates the 100 times.
Its the same because you're still adding Numbers, it's different because you're adding a fraction basically