Hello i need with these and if you would like to more i will be posting multiple questions
1. suppose you know that ∠s and ∠y are complementary and that m∠s = 2 (m∠y) -30° find m∠y

2. how can you model geometery figures to solve real world problems

bonus: brainliest
3. iyras built a model of the great pyramid in egypt for a school project the great pyramid has a square base with sides of length 756 feet the height of the great pyramid is 481 feet iyras made his model pyramid using a scale of 1 inch : 20 feet
a. what is the length of each side of the base of iyras period?
b. what is the area of iyras pyramid?
c. what is the height of iyras pyramid
d ira built his model using cross sections that were cut parallel to the base what shape was each cross section