Hennea9505idn
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Find lateral Area
9.7km
A) 178 km²
B) 166. 1 km²
c) 84.4km?
D 135.8 km2
1
A
ns
7km
7km

Find Lateral Area 97km A 178 Km B 166 1 Km C 844km D 1358 Km2 1 A Ns 7km 7km class=

Sagot :

Semsee45idn

Answer:

d) 135.8 km²

Step-by-step explanation:

The lateral area of a square-based pyramid is the sum of the areas of its triangular faces.

Area of a triangle = 1/2 × base × height

Given:

  • base = 7 km
  • height = 9.7 km

⇒ area of triangular face = 1/2 × 7 × 9.7

                                         = 33.95 km²

Total lateral area = 4 × area of triangular face

                             = 4 × 33.95

                             = 135.8 km²

ItzTdsidn

Answer:

135.8 km² {option d}

Step-by-step explanation:

The given information is,

→ Height (h) = 9.7 km

→ Base (b) = 7 km

Formula we use,

→ 1/2 × b × h

The area of the face of triangle will be,

→ x = 1/2 × b × h

→ x = 1/2 × 7 × 9.7

→ x = 1/2 × 67.9

→ x = 67.9/2

→ [ x = 33.95 ]

The lateral area of the triangle will be,

→ 4 × x

→ 4 × 33.95

→ [ 135.8 km² ]

Hence, the lateral area is 135.8 km².

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