20 POINTS! In the 19th century alternatives to the fifth postulate of euclidean geometry were discovered.

A. True
B. False

True is the correct answer to the given question.

Step-by-step explanation:

Euclidean geometry  is the mathematical technique that are discovered by the Greek mathematician Euclid of the Alexandria .In the In the 19th century  fifth postulate of the euclidean geometry are created.

it is true

step-by-step explanation:

all the combinations add up i used   calculator

the answer is b: 18

step-by-step explanation:

use the pythagorean theorem to .

a^2+b^2=c^2

plug 18 for "r"

the 2 legs are 18 and 24

18^2+24^2=c^2

324+576=c^2

900=c^2

c=30

30-12=18

18 is the radius

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