Segments AB, EF, and CD intersect at point C, and angle ACD is a right angle. Select all the equations that represents the relationship between the measures of the angles in the figure

Me! #1 write an equation for the interior angles of this triangle that uses the triangle sum theorem. #2 what is the value of x? #3 what is the measure of #4 classify the triangle above as acute, obtuse, or right. state your reason in a complete sentence.

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

An arc subtends a central angle measuring 7pi/4 radians what fraction of the circumference is this arc?