The proofing of the triangle is illustrated below.
<h3>How to illustrate the proof?</h3>
AB = c
BC = a
AC = b
h² = b² - x²
h² = a² - y²
a² - y² = b² - x²
a² = b² - x² + y²
Note that x = c - (c - x) = c
a² = b² - (-x)² + y²
a² = b² + c² + y²
Cos A = x/b
cos = adjacent/hypothenuse
x = bcosA
a² = b² + c² - 2bx
a² = b2 + c² - 2bccosA
Learn more about triangles on:
brainly.com/question/1058720
#SPJ1
Answer:
Step-by-step explanation:
i Don't now how to explain the answer
Answer:
Anton's definition is not valid.
Step-by-step explanation:
We have been given that Anton defines an acute angle as an angle that is not obtuse. We are asked to find whether Anton's definition is valid or not.
We know that an angle is known as acute angle whose measure is greater than 0 and less than 90 degrees.
We also know that an angle is known as obtuse angle whose measure is greater than 90 degrees and less than 180 degrees.
We know that a right triangle is neither acute nor obtuse. Since Anton hasn't mentioned a right triangle to his definition, therefore, his definition is not valid.
<h3><u><em>Answer: The answer is 15</em></u></h3><h3><em><u /></em></h3><h3><em><u /></em></h3><h3><u><em>Step-by-step explanation:</em></u></h3>
<em><u /></em>