What is the area, in square feet, of the triangle whose sides have lengths equal to 10, 6 and 8 feet? A) 480 B) 24 C) 48 D) 30 E) 40
A = (1/2)(6)(8) = 24 feet2
Of the 80 students in class, 25 are studying German, 15 French and 13 Spanish. 3 are studying German and French; 4 - French and Spanish; 2 - German and Spanish; and none is studying all 3 languages. How many students are not studying any?
80 - (20 + 3 + 8 + 4 + 2 + 7) = 36
AB is a diameter of the large circle. The centers C1 and C2 of the smaller circles are on AB. The two small circles are congruent and tangent to each other and to the larger circle. The circumference of circle C1 is 8 π. What is the area?
A = Pi * 82 = 64 Pi