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<h3>Given:</h3>
- Pentagon
The size of the unknown angle "x"
<h3>Solution:</h3>The given polygon is a Pentagon so the sum of interior angle will be,
n means the number of sides
Let's substitute the values according to the formula.
Now, we can find the sum of one interior angle.
n means the number of sides.
Let's substitute the values according to the formula.
<u>Therefore</u><u>,</u><u> </u><u>the</u><u> </u><u>size</u><u> </u><u>of</u><u> </u><u>the</u><u> </u><u>unknown</u><u> </u><u>angle</u><u> </u><u>"</u><u>x"</u><u> </u><u>is</u><u> </u><u>1</u><u>0</u><u>8</u><u>°</u>
Answer:
<em> SSS</em><em> can be used to prove that the given triangles are congruent.</em>
Step-by-step explanation:
In the given two triangles ΔADC and ΔABC,
- AD = AB = 7 units,
- CD = BC = 8 units,
- AC is common to both triangles,
Hence, ΔADC ≅ ΔABC by Side-Side-Side (SSS) congruence.
SSS congruence-
If three sides of one triangle are congruent to three sides of another triangle, then the triangles are congruent.
