Base your answers to questions 45 through 47 on the diagram below and on your knowledge of earth
science. the diagram represents earth in its orbit around the sun. locations a through d represent four
positions of earth in its orbit. earth is closest to the sun (perihelion) at position a, and farthest from the sun (aphelion) at position c.
at all four positions, the northern end of earth’s axis points toward
(1) the sun
(2) the moon
(3) betelgeuse
(4) polaris

By looking at the given diagram above and all of the positions on the diagram, the northern end of the Earth's axis points towards the Polaris at all four positions of the diagram. The correct answer choice is 4, Polaris. 

In a right-angled triangle: 1- the hypotenuse is the longest side2- we can apply pythagorean rule which states that: (hypotenuse)^2 = (side1)^2 + (side2)^2for the given triangle,longest side is 15 cm  side1 = 9 cmside2 is 12 cm  to check whether the triangle is right-angled or not,compare (15)^2 to the summation of (9)^2 and (12)^in other words, compare 225 to the summation of 81 and 144if they are both equal, then the triangle is right-angles, otherwise, it is not.you haven't provided the diagram showing her work, so i cannot tell the choice. however, apply my explanation to the question you have.