Answer:
88
Step-by-step explanation:
8x8=64
1/2(8x6)=24
64+24=88
The answer is the option A, which is: A. Equilateral triangles.
The explanation for this answer is shown below:
By definition, a tetrahedron is a solid in three dimensions that has: six sides, four vertices and four triangular faces. These faces are equilateral triangles, which means that all the sides are equal and all the interior angles measure
degrees.
The tetrahedron is also called "triangular pyramid".
Answer:
x = 80
Step-by-step explanation:
In a quadrilatoral the interior angle sum always adds up to 360 degrees so to find x you would add all of the interior angle sums and subtract that from 360
115 + 95 + 70 + x = 360 just add the like terms
280 + x = 360 now subtract 280 from both sides so x is alone and you can figure out its value
x= 80
The pattern goes +1; +2; +3; +4; +5; +6... Since it ends at +6, the next you need to do is +7. 24 + 7 is 31 and that will come next.
Numbers after 31:
39
48
58
69
81
94
108
.
.
.