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klio [65]
3 years ago
8

____________________ helps explain why there are a large number of marsupial mammal species in Australia and South America, two

continents that were once connected
. A) Ozone production
B) Continental drift
C) The fifth mass extinction
D) The first mass extinction
Mathematics
2 answers:
Marta_Voda [28]3 years ago
4 0
Continental Drift because all continents were once connected by the name of Pangea
olya-2409 [2.1K]3 years ago
3 0

Answer:

option: B is the correct answer.

( Continental drift)

Step-by-step explanation:

" Continental drift describes one of the earliest ways geologists thought continents moved over time. Today, the theory of continental drift has been replaced by the science of plate tectonics "

Hence, Continental Drift helps explain why there are a large number of marsupial mammal species in Australia and South America, two continents that were once connected.

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8 0
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PQ is a chord of length 8 cm of a circle of radius 5 cm. The tangents at P and Q intersect at a point T. the length TP in cm is:
kolezko [41]
<h3><u>Given</u><u> </u><u>:</u><u>-</u></h3>
  • PQ = 8cm
  • Radius = 5cm
  • Two Tangents = P & Q.
<h3><u>Construction</u><u> </u><u>:</u><u>-</u></h3>
  • Join OT.
<h3><u>⟼</u><u> </u><u>Solution</u><u> </u><u>:</u><u>-</u></h3>

Here, ΔTPQ is isosceles and TO is the angle bisector of ∠PTO.

[∵ TP=TQ = Tangents from T upon the circle]

⠀⠀⠀⠀⠀⠀⠀⠀∴ OT⊥PQ

  • So, PR = RQ = 4cm.

⠀⠀⠀

___________________________________________

\longmapsto{}By Applying Pythagoras Theorem in ∆OPR :

OR = √OP² - PR²

OR = √5² - 4²

OR = 3cm

__________________________________________

Now,

\leadsto∠TPR + ∠RPO = 90° (∵TPO=90°)

\leadsto∠TPR + ∠PTR (∵TRP=90°)

<u>\leadsto</u><u>∴ ∠RPO = ∠PTR</u>

⠀⠀

<u>∴ Right triangle TRP is similar to the right </u><u>triangle</u><u> </u><u>PR</u><u>O</u><u>.</u> [By A-A Rule of similar triangles]

⟼\frac{TP}{PO}  =  \frac{RP}{RO}

⟼\frac{TP}{5}  =  \frac{4}{3}

⟼TP=  \frac{20}{3}

<h3>Hence you got your answer here. </h3>

⠀⠀⠀⠀⠀

<h2>-MissAbhi</h2>

6 0
2 years ago
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