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Sphinxa [80]
4 years ago
12

Two angles of a triangle measure 55 and 20 what is the measure of the third angle of the triangle

Mathematics
1 answer:
-Dominant- [34]4 years ago
4 0

Answer:

105 degrees is the third angle measure.

Step-by-step explanation:

All triangles angle measures add up to 180 degrees, so 55+20=75, and 180-75=105, therefore the answer is 105.

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oee [108]

Answer:

\sqrt{82  }

Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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3 years ago
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In triangle △ABC, ∠ABC=90°, BH is an altitude. Find the missing lengths. AB=9, and AC=12, find HC.
pickupchik [31]

Answer:

Step-by-step explanation:

It is given that in △ABC, ∠ABC=90°, BH is an altitude and AB=9 and AC=12, thus using the Pythagoras theorem in △ABC, we get

(AC)^{2}=(AB)^{2}+(BC)^{2}

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Now, From ΔABC and ΔHBC, we have

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By AA similarity, ΔABC is similar to ΔHBC.

Thus, using the similarity condition, we get

\frac{HC}{BC}=\frac{BC}{AC}

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7 0
3 years ago
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aliina [53]
The measurement of STR is 24 degrees
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3 years ago
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