trig
posted by ...wew .
Find the altitude of an isosceles triangle whose base in 30 cm vertex angle is 75 degres

draw the altitude,
I see a rightangled triangle with base 15 and base angle of 52.5°
Call the height h
h/15 = tan 52.5
h = 15tan 52.5
= ....
I will let you do the buttonpushing.
Respond to this Question
Similar Questions

corollary to isosceles triangle theorem
how to prove 1)the measure of each angle of an equilateral triangle is 60. 2)the bisector of the vertex angle of an isosceles triangle is the perpendicular bisector of the base. Thanks. 1) The angles in any triangle have to add up … 
vertex angle
The three angles add to 180 degrees. Also , the two base angles of the isoscele triangle are equal, .. Set those base angles equal, and solve for x. Put that value of x into the given, and compute the base angles. The third angle will … 
trig
Find altitude of isosceles triangle if angle=53 degrees (the equal angles) and the base is 8 inches. 
Geometry
Can you help me with Always, Sometimes, Never questions? 
Geometry Honors
Can someone help me with Always, Sometimes, Never questions? 
math
Find the altitude of an isosceles triangle whose base is 8 cm and whose legs are 5 cm? 
math
Find the altitude of an isosceles triangle whose base is 8 cm and whose legs are 5 cm? 
Trigonometry
find the perimeter of an isosceles triangle whose base is 20cm and the vertex angle is 120 degrees. 
Trig
An isosceles triangle has legs 4 feet long. If the vertex angle measures 30 degrees, find the length of the base. 
Geometry
An exterior angle of an isosceles triangle has measure 150°. Find two possible sets of measures for the angles of the triangle. If the exterior angle of the bases is 150°, then the measure of the angle of each base is _° and …