Per a mesurar l'alçada d'un fanal, durant el dia, la Laura en farà servir l'ombra. Pot mesurar l'ombra del fanal, que fa 9 metres, així com la seva pròpia ombra, que fa 2,40m. Si ella sap que medeix 1,60m, quina mida té el fanal?

11

step-by-step explanation:

32.50-7.50=25

225/25=11

step-by-step explanation:

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see explanation

step-by-step explanation:

a

(6r + 7) + (13 + 7r) ( remove brackets and collect like terms )

= 6r + 7 + 13 + 7r

= 13r + 20

b

remove brackets and collect like terms

13 - r - 1 + r

= 12 - r

c

remove brackets and collect like terms

= - 8 - r + 2r - 4

= - 12 + r

d

remove brackets and collect like terms

= 7r - - - 6r

[-   - = - - = - ]

= r -

question

given the diagram below, what is md?

the sum of the interior angles is 360°

take away from 360 the sum of the knows angles and you will have the angle d.

360 - 108 - 108 - 72 = 72°