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Keith_Richards [23]
3 years ago
12

dibuja un triangulo de catos de 15cm, 8cm. al unir sus puntos medios resulta un triangulo semejante a este

Mathematics
1 answer:
marshall27 [118]3 years ago
4 0

Answer:

Step-by-step explanation:

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All radical expressions that are equivalent to 3 2/5
SCORPION-xisa [38]

Answer:

15

Step-by-step explanation:

√15 (3√5)^2 3√5^2 3√10

4 0
3 years ago
How do you solve this problem?
Leona [35]
Make it better can't read it sorry
4 0
3 years ago
Read 2 more answers
From a window 20 feet above the ground, the angle of elevation to the top of a building across
Nikitich [7]

Answer: The answer is 381.85 feet.

Step-by-step explanation:  Given that a window is 20 feet above the ground. From there, the angle of elevation to the top of a building across  the street is 78°, and the angle of depression to the base of the same building is 15°. We are to calculate the height of the building across the street.

This situation is framed very nicely in the attached figure, where

BG = 20 feet, ∠AWB = 78°, ∠WAB = WBG = 15° and AH = height of the bulding across the street = ?

From the right-angled triangle WGB, we have

\dfrac{WG}{WB}=\tan 15^\circ\\\\\\\Rightarrow \dfrac{20}{b}=\tan 15^\circ\\\\\\\Rightarrow b=\dfrac{20}{\tan 15^\circ},

and from the right-angled triangle WAB, we have'

\dfrac{AB}{WB}=\tan 78^\circ\\\\\\\Rightarrow \dfrac{h}{b}=\tan 15^\circ\\\\\\\Rightarrow h=\tan 78^\circ\times\dfrac{20}{\tan 15^\circ}\\\\\\\Rightarrow h=361.85.

Therefore, AH = AB + BH = h + GB = 361.85+20 = 381.85 feet.

Thus, the height of the building across the street is 381.85 feet.

8 0
3 years ago
Someone please help me I’ll give out brainliest please dont answer if you don’t know
NARA [144]

Answer:

m=2

Step-by-step explanation:

42=8m+13m

or,42=21m

or,42/21=m

or,m=2

This is the required answer for m.

To check,

42=8×2+13×2

42=16+26

42=42

Correct

7 0
3 years ago
WHAT IS THE SURFACE AREA OF THE FIFURE?
max2010maxim [7]
I think the correct answer is 560ft^2.
7 0
3 years ago
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