Answer:
17
Step-by-step explanation:
- midpoint means half
- Let's name side 15 as A,11 as B and 8 as C
- 0.5 of A is 0.5×15=7.5
- 0.5 of B is 0.5×11=5.5
- 0.5 of C is 0.5×8=4
- Perimeter of small triangle =A+B+C
- 7.5+5.5+4=17
Answer:
1 yes
2 yes
3 yes
4 no
5 no
Step-by-step explanation:
Decimals cannot be integers
:D
A+B: the matrix with same dimension a A and B, the element in row i and column j is: Aij+Bij
Same for A-B, but with Aij-Bij
Answer:
Similar Triangles must have matching angles, so you need to prove the angles all match.
Step-by-step explanation:
1.
Angle RTW = Angle STV becasue it's the same angle.
2.
Because ST is parallel to RW and RT cuts through those two parallel lines, you have
Angle TSV = Angle TRW because they are corresponding angles.
3.
Because ST is parallel to RW and TW cuts through those two parallel lines, you have
Angle TVS = Angle TWR because they are corresponding angles.
So now you know the three angles in each triangle match the three angles in the other triangle. They're similar triangles.
