Determine the value of x in the figure. answers: A) x = 60 B) x = 50 C) x = 130 D) x = 65

Mathematics

2 answers:

brilliants [131]3 years ago

5 0

Answer:

x = 65

Step-by-step explanation:

This is an isosceles triangle which means that 2 angles are the same and all the angles have to equal 180.

A - 60+60+50 = 170(not 180)

50+50+60 = 160(not 180)

A is eliminated.

B is eliminated because then it will be an equilateral triangle.

C - 130+130+50 = 310(not 180)

50+50+130 = 230(not 180)

C is eliminated which leaves D.

D = 65+65+50 = 180(TRIANGLE!!!!!!!!!!)

Arada [10]3 years ago

3 0

Answer:

Step-by-step explanation:

Since the triangle has 2 congruent sides then the triangle is isosceles and the base angles are congruent, thus

x = $\frac{180-50}{2}$ = $\frac{130}{2}$ = 65 → D

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Step-by-step explanation:

A postulate is a statement that is assumed true without proof. A theorem is a true statement that can be proven

In geometry, the theorem is considered valid or correct with which its assertion is practically not refuted by almost anyone, whether it is really true or not.

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See Attachment for Details ^^

The image attached represents the statement given in the question (If two distinct planes intersect, then their intersection is a line)

Therefore,

The Geometry term that represents the statement above is POSTULATE