Before 1980, Mount St. Helens
was cone shaped with a height of about 1.83 miles
and a base radius of about 3 miles. In 1980.
Mount St. Helens erupted. The tip of the cone was
destroyed, as shown, reducing the volume by
0.043 cubic mile. The cone-shaped tip that was
destroyed had a radius of about 0.4 mile. How
tall is the volcano today? (Hint: Find the height of
the destroyed cone-shaped tip.)

What is the slope of the line that contains the points (4,8) and (9,8)? what type of line is it?

In the figure below, segment ac is congruent to segment ab: triangle abc with a segment joining vertex a to point d on side bc. side ab is congruent to side ac which statement is used to prove that angle abd is congruent to angle acd? segment ad bisects angle cab. triangle acd is similar to triangle abd. segment ad is congruent to segment ac. angle cab is congruent to angle cba.

Given: lines a and b are parallel and line c is a transversal. prove: 2 is supplementary to 8 what is the missing reason in the proof? statement reason 1. a || b, is a transv 1. given 2. ∠6 ≅ ∠2 2. ? 3. m∠6 = m∠2 3. def. of congruent 4. ∠6 is supp. to ∠8 4. def. of linear pair 5. ∠2 is supp. to ∠8 5. congruent supplements theorem corresponding angles theorem alternate interior angles theorem vertical angles theorem alternate exterior angles theorem