Use the function r=n-7 to find the value of r when n =10

Me because some of question i don’t understand

Given: δabc, m∠1=m∠2, d∈ ac bd = dc m∠bdc = 100º find: m∠a m∠b, m∠c

Find a conversion factor between square centimeters and square meters. write it in three forms. square centimeters = 1 square meter