1. ABC is an isosceles triangle at AB = AC , if ∠ BCA =700 then ∠ ABC =
2. A linear equation in two variables has .
3. The region between an arc and two radii , joining the center to the end points of the arc is called a
4.The zero of the polynomial p(x ) = 2x – 5 is
5.The formula for finding LSA of a cuboid is

Grace is standing 18 feet from a lighthouse and kelly is standing 10 feet from grace. the angle that grace looks up to see the top of the lighthouse is 45°. the angle that kelly looks up to see the top of the lighthouse is y°. find the height, h, of the lighthouse. find the angle, rounded to the nearest tenth of a degree, in which kelly looks up to the top of the lighthouse. to the nearest tenth of a degree, find the value of x° . in two or more sentences, explain your calculations