(c): One of the statements below is true for the perimeter of triangle D . Tick \( (\checkmark) \) the correct one. The perimeter is less than 24 cm . Therimeter is 24 cm . Explain you answer.

Find the volume of the pyramid with base in the plane \( z=-5 \) and sides formed by the three planes \( y=0 \), and \( y-x=1 \) and \( x+y+z=0 \). NotE: Enter the eroct answer.

Problema di geometria piana (sul foglio protocollo) - Un'aiuola ha una forma triangolare con un angolo retto. Per fare la recinzione lungo il perimetro dell'aiuola sono state misurate le lunghezze dei due cateti, che valgono rispettivamente 234 cm e \( 4,62 \mathrm{~m} \). (Scrivi bene formule, calcoli con tutte le unità di misura). a) Scrivi i dati, le incognite e rappresenta la situazione con un disegno. b) Determina la lunghezza di tutto il Perimetro (in metri) per poter comprare la recinzione di dimensioni corrette.

A fish tank length, breadth and height is \( 40 \mathrm{~cm}, 60 \mathrm{~cm} \) and 50 cm respectively. It contains 50 liter of water, How much water is needed to fill it completely.

Case Study Based Question There was a deserted land near Ryan's house. The colony people used to throw garbage on that land. Ryan, along with his friends, decided to develop the land into a park with walking track with uniform width, where children can play and elders can work. On the basis of above information answer the following questions: (a) What is the width of the track? (b) Find the breadth of inner rectangle. (c) Find the area of walking track. (d) Find the cost of leveling the park including the track at the rate 210 per square m . (e) Which values Ryan has shown here?

Find the area of a vector of radius 10.5 cm pubtended by an angle of \( 1 / 3 \pi^{\mathrm{C}} \) at the centre ( 3 marks)