A triangle with two congruent sides is always a 45-45-90 triangle. A. True B. False
2 answers:
Answer:
False
Step-by-step explanation:
1) If a triangle has two congruent sides, then we are dealing with an isosceles triangle. If a triangle has two congruent sides and it is a 45º,45º,90º it's a special case of an isosceles triangle called Right Isosceles Triangle.
The Sum of its interior angles must be equal to 180º always!
2) Check it out below an example of an Isosceles Triangle. ∠E≅∠G
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Answer:
Step-by-step explanation:
Let be the greater number and
be the smaller number. We know that their difference is 15, so we have
Then, we have the following information: if we add twice the greater (2x) and 8 (2x+8), the result is 3 times the lesser (3y) minus four (3y-4). So, we have
So, we have the follwing system:
From the first equation, we can derive , and substitute this expression in the second equation to get
Substitute this value for y in the first equation to get