The area of a triangle is 30cm and its base is 10cm. What is the height, in cm, of the triangle

6cm

Step-by-step explanation:

Area of a triangle is 1/2bh

B= base

H= height

Area = 30cm

Substitute the values into the formula

Area= 1/2bh

30=1/2×10×h

30=5h

H=30/5

H= 6cm

Height of the triangle is 6cm

check the picture below.

well, the angle at the vertex d is clearly not a right-angle, let's check for the one at the vertex f which does look like,   however if it's indeed, that means ef is perpendicular to df, in which case their slopes will be negative reciprocal of each other.

so the negative reciprocal of the slope of ef is 1, however the slope of df is not 1, is 1/2, so nope, they're not perpendicular lines.

  or  

step-by-step explanation:

if the four friends split the cost, p, of the pizza evenly, then each friend pays one-fourth of the cost of the pizza.

the expression is   or