Question

HURRY!!!When are two triangles said to be in perspective?

Answer 1

1. A
Two triangles are said to be in perspective (or as some would call it, homologous) from a point if their corresponding vertices form three lines that intersect in that single point (called a colinear point). Desargues' theorem asserts that if two triangles are in perspective from a point, then they are also perspective from a line (called the perspectrix); for this reason perspective triangles are also calles coplanar triangles.

2. B (13)
The series of numbers shown in  the question is known as the Fibonacci Sequence. The next number in the sequence is found by finding the sum of the two numbers that precede it.

1 = 0+1
2 = 1 + 1
3 = 1 + 2
5 = 3 + 2
8 = 5 + 3

Next number is 13 (8 + 5)