The shadow of a tree is 10m longer when the angle of elevation of the sun is 45° than when it is 60. Find the height of the tree leaving your answer in surd form

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angle measure.

Lance lived in portugal and brazil for a total of 14 months to learn portuguese. he learned an average of 130 new words per month when he lived in portugal, and an average of 150 new words per month when he lived in brazil. in total he learned 1920 new words. write a system of equations to represent the situation. use x to represent portugal, and y to represent brazil

Name each raycalculation tip: in ray "ab", a is the endpoint of the ray.