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Pinion
24.09.2019 •
Mathematics
Are the two triangles below similar? (my guess is c)
a: no, because there are not two pairs of congruent corresponding angles
b: yes, because there are two pairs of congruent corresponding angles
c: no, because the corresponding sides are not proportional
d: yes, because the corresponding sides are proportional
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Ответ:
Both triangles have identical inside angles, so the answer should be::
B: Yes, because there are two pairs of congruent corresponding angles
Ответ:
B: Yes, because there are two pairs of congruent corresponding angles.
Step-by-step explanation:
In ΔTUV
∠T+∠U+∠V=180° [By angle sum property of triangle]
⇒ ∠T= 180°-∠V-∠U
⇒ ∠T= 180°-55°-80°
⇒∠T=180°-135°
⇒∠T=45°
Now, in ΔTUV and ΔXYW
∠T=∠X=45° and ∠V=∠W=55°
⇒ ΔTUV ≈ ΔXYW [AA- similarity criteria of triangles.]
AA Similarity Postulate tells that two triangles are said to be similar if they have two corresponding angles that are congruent in measure.
Ответ:
12
Step-by-step explanation:
3x + 6 + 48 = 90
3x + 54 = 90
3x = 36
x = 12